PHYSICS REVIEW GAME EARN EXTRA POINTS TOWARDS YOUR SCIENCE FINAL GRADE
WHAT IS DISTANCE? • A. It is the length of a path between two places. • B. It is the length of time between two places. • C. It is the direction of the path between two places. • D. It is the unit used to measure length.
HOW IS SPEED DEFINED? • A. Time divided by distance • B. Time divided by direction • C. Distance divided by time • D. Distance divided by direction
WHAT IS THE AVERAGE SPEED OF A TRUCK THAT TRAVELED 120 MILES IN 3 HOURS? • A. 55 miles per hour • B. 40 miles per hour • C. 25 miles per hour • D. 4 miles per hour
WHAT IS THE DIFFERENCE BETWEEN SPEED AND VELOCITY? • A. Speed includes direction and velocity does not. • B. Velocity includes direction and speed does not. • C. Neither include direction. • D. Speed and velocity are the same.
WHICH OF THESE HAS THE GREATEST VELOCITY? • A. a cheetah running north at 30 m/s • B. a balloon rising upward at 20 m/s • C. a truck moving south at 35 m/s • D. a dog walking east at 3 m/s
WHAT IS THE VELOCITY OF A CAR THAT DRIVES EAST FOR 2 HOURS AT A CONSTANT SPEED OF 50 mph? • A. 50 mph • B. 50 mph eastward • C. 25 mph • D. 25 mph eastward
DOES A DOG RUNNING SOUTH AT 2 m/s AND A BALL ROLLING SOUTH AT 2 m/s HAVE: • A. the same speed? • B. the same velocity? • C. both? • D. neither?
A BALLOON MOVES UPWARD A DISTANCE OF 4 m IN 2 s. WHAT IS THE BALLOON’S VELOCITY? • A. 2 m/s • B. 0.5 m/s • C. 2 m/s upward • D. 0.5 m/s upward
WHICH OF THESE HAS TO OCCUR FOR A CHANGE IN VELOCITY TO TAKE PLACE? • A. A change of speed • B. A change of direction • C. A change in both speed or direction • D. None of these
Why is force considered a vector quantity? • A. Its size can be measured in newtons. • B. It acts in a particular direction. • C. It can be balanced. • D. Its measurement is both size and direction.
A girl standing on the ground exerts a force on the ground of 490 newtons. Which best describes the force she exerts on the ground? • A. 490 newtons • B. 490 newtons downward • C. 490 newtons sideways • D. 490 newtons upwards
Which of the following forces has the smallest size? • A. a 20 N force acting east • B. a 50 N force acting up • C. a 70 N force acting west • D. a 70 N force acting down
A boy pushes a box 50 N east and a girl pushes a chair 50 N west. How do the two forces compare? • A. The forces have the same size but different direction. • B. The forces have the same size and same direction. • C. The forces have a different size and direction. • D. None of the above
A toy rocket is launched straight up into the air with a force of 16N. The weight of the rocket, 4 N, pulls down on the rocket. What is the net force on the rocket when its launched? • A. 4 N upward • B. 12 N upward • C. 16 N downward • D. 20 N downwards
Two people push on a ball from opposite sides. One exerts a force of 80 N and the other exerts a force of 60 N. What is the size of the force? A. 20 N B. 40 N C. 60 N D. 100 N
When are forces on an object balanced? • A. When the combined forces are identical in size and direction. • B. When the combined forces are smaller than the balanced force. • C. When the combined forces are larger than the balanced force. • D. When the combined forces have the same effect as no force.
A static object is able to remain at rest because: • A. The force of gravity is always acting on it. • B. Balanced forces are acting on it. • C. Compression forces are acting on it. • D. Tension keeps it from being pulled apart.
You put a plate on the table. What are the forces acting on the plate? • A. Friction & gravity • B. Friction & elastic forces • C. Gravity & elastic forces • D. Gravity & tension
Which shows the cumulative effect of forces? • A. The speed of a ball after being hit by a bat • B. The length of a shadow • C. The volume of a cereal box after it’s opened • D. The average time of a marathon’s runners
What is the average speed of a truck that travels 180 km in 2 hours? • A. 90 km/h • B. 90 km/2h • C. 360 km/h • D. 180 km/h
A train is traveling west at 50 km/h. A few minutes later, the tracks change direction and the train travels south at the same speed. Which statement is true? • A. The speed of the train changed. • B. The average speed of the train changed. • C. The velocity of the train stayed the same. • D. The velocity of the train changed.
If a car travels 20 miles in 20 minutes, you can calculate its: • A. Velocity • B. Average speed • C. Direction • D. Change in speed
The distance vs. time graph for an object traveling at a constant speed is a: • A. Curved line • B. Horizontal line • C. Vertical line • D. Diagonal line
A short stack and a taller stack of books is pushed across a desk. Which statement is true about the force needed to push each stack? • A. Greater force is needed to push the short stack. • B. Greater force is needed to push the taller stack. • C. The force required to move each stack is the same. • D. All forces are unbalanced.
Which statement is true about all forces? • A. All forces cause acceleration. • B. All forces cause a change in motion. • C. All forces have magnitude and direction. • D. All forces are unbalanced.
Which jar requires the most force to lift it? • A. A jar full of cotton balls • B. A jar full of plastic foam chips • C. A jar full of pennies • D. A jar full of sawdust
Earth is a sphere because: • A. it is much less massive than the sun. • B. it is millions of miles from the sun. • C. gravity pulls any bulges toward the center. • D. there was not enough gravity for it to become a star.
Which result occurs when balanced forces act on an object? • A. Its state of motion does not change. • B. It changes direction. • C. It slows down. • D. It speeds up.
A ball rolls slowly toward a person who then kicks the ball hard in the same direction it had been rolling. What happens to the motion of the ball? • A. The ball speeds up. • B. The ball slows down. • C. The ball continues at the same speed. • D. The ball travels at the same speed but changes direction.
A boy pushes a wagon that is rolling down a hill so that it will roll faster. Which of the following describes the force the boy applies? • A. a balanced force • B. a force in the direction of the wagon’s motion • C. a force in the direction opposite of the wagon’s motion • D. a force at the right angle to the wagon’s motion
A bicycle turns around a corner. What can be said about the forces on the bicycle as it turns? • A. The forces are balanced. • B. The forces are unbalanced. • C. There are no forces on the bicycle. • D. Nothing. There is not enough information.
A soccer player stops a rolling ball with her foot. What kind of force or forces could she have applied? • A. two balanced forces • B. a force underneath the ball • C. a force in the direction of the ball’s motion • D. a force in the direction opposite of the ball’s motion
A box sliding along the floor comes to a stop. Why? • A. gravity • B. rolling friction • C. no forces, it just came to a stop. • D. sliding friction and gravity
If you increase the force you exert on an object, you will • A. decrease its mass • B. increase its mass • C. decrease its acceleration • D. increase its acceleration
You are in an elevator moving upward from the second floor to the ninth. From the reference point of the elevator, you are • A. going up • B. going down • C. not moving • D. changing velocity
A family drives across the state to visit relatives. They drive for one hour at 60 km/h and one hour at 90 km/h. What is their average speed? • A. 30 km/h • B. 60 km/h • C. 75 km/h • D. 150 km/h
You exert a force to push a box across the floor. You exert the same amount of force to pull the box back. How are the two forces different? • A. The direction is different. • B. The amount of force is different. • C. The pushing force is balanced, but the pulling force is unbalanced. • D. The forces are not different.
Two students push equally on a box in opposite directions. What happens to the box? • A. The box moves to the right. • B. The box moves to the left. • C. The box does not move. • D. The box tips over.
Which of the following keeps a bag of sand connected to a spring scale? • A. The downward pull of gravity • B. The elastic force of the spring • C. The upward push of gravity • D. The mass of the sand bag
Which force causes the downward curving motion of a basketball in flight? • A. The balanced force exerted by the basketball player • B. The balanced force of gravity • C. The unbalanced force exerted by the basketball player • D. The unbalanced force of gravity
Which force is responsible for the formation of the planets? • A. gravity • B. friction • C. elastic • D. acceleration
If you exert the same force on an object with low mass and an object with a higher mass, what will happen? • A. The object with lower mass will increase its mass. • B. The object with the higher mass will increase in mass. • C. The object with lower mass will have greater acceleration. • D. The object with higher mass will have greater acceleration.
A 1-kilogram object accelerates when a force of 10 newtons acts on it. If the force doubles in size, the acceleration will • A. increase • B. decrease • C. stay the same • D. become zero
The force of gravity causes • A. any two objects to attract one another. • B. any two objects to repel one another. • C. any two objects to decrease in mass. • D. any two objects to increase in mass.
Friction is a force that • A. opposes an object’s motion. • B. does not exist when surfaces are very smooth. • C. decreases with larger mass. • D. all of the above
Rolling friction • A. is usually less than sliding friction. • B. makes it difficult to move objects on wheels. • C. is usually greater than sliding friction. • D. is the same as fluid friction.
If Earth’s mass doubled, your weight would • A. increase because gravity increased. • B. decrease because gravity increased. • C. increase because gravity decreased. • D. not change because you are still on Earth.
A Force • A. is expressed in newtons • B. can cause an object to change speed. • C. is a push or a pull. • D. all of the above
If passengers on an airplane watch another plane passing them, their reference point is the • A. sky. • B. ground. • C. other plane. • D. plane they are on.