Category 2 Test. 1 The graph shows the movement of a car over time. What is the car’s average speed? A 10 kilometers per hour B 15 kilometers per hour C 30 kilometers per hour D 60 kilometers per hour.
1 The graph shows the movement of a car over time. What is the car’s average speed?A10 kilometers per hourB15 kilometers per hourC30 kilometers per hourD 60 kilometers per hour
2 Which of the following devices converts chemical energy to light energy?A C Wind turbines FlashlightB D Electric Lamp Solar cells
3 Diesel fuel is used in the engines of the machines and trucks at the quarry. Which of these is the main energy transformation as the fuel is used by the engines?
A Electrical energy is converted to heat energy.BHeat energy is converted to potential energy.CElectrical energy is converted to kinetic energy.D Chemical energy is converted to kinetic energy.
AChemical energy to heat energyBHeat energy to potential energyCElectrical energy to heat energyD Kinetic energy to potential energy
5In the diagram above, a wind turbine is transforming energy from the wind. Between which two steps in the diagram is mechanical energy being converted into electrical energy?
A 1 and 2
B 2 and 3
C 3 and 4
D 4 and 5
6 When the human heart contracts, it pumps blood to other parts of the body. When the heart contracts, the blood moves because the —A pressure in the heart increasesB temperature of the blood increasesC density of the blood increasesD size of the heart increases
7 The diagram above shows a barrel moving toward a waterfall. The barrel will have the greatest potential energy at which of these locations?A WB XC YD Z
A Air leaking from a flat tireBStress built up in a rock faultCHeat given off by a forest fireD Water flowing through a hose
9 At which point on the roller coaster will the car have the greatest amount of kinetic energy?AWBXCYD Z
seconds, in which situation
will the box be moved the
Javelina11 Javelinas need strong leg muscles to help provide enough force for them to accelerate to high speeds. This fast movement can help javelinas escape from predators and reach the safety of the pack. If a javelina runs 42 m in 6 s, what is its average speed?A 6 m/sB 7 m/sC 48 m/sD 252 m/s
that would cause the car to move forward?
A The force of the engine is less than the force of friction.
B The pulling force is greater than the force pushing on the car.
C The pushing force is less than the force pulling on the car.
D The force of the engine is greater than the force of friction.
Which of the following objects would have the greatest acceleration if they each have 15 N of force acting upon it?
A 5g ball
B 10g rock
C 50g orange
D 100g book
For an investigation, a student measures the speed of a cart as it rolls down a ramp. The student then records data in the table below.
Which of these best explains the student’s data?
AThe speed of the cart decreases as the cart rolls down the ramp because of friction
between the cart and the ramp.
BThe speed of the cart increases as the cart rolls down the ramp because the force acting
on the cart is greater than the force of gravity.
CThe speed of the cart increases as the cart rolls down the ramp because the forces acting
on the cart are unbalanced.
D The speed of the cart decreases as the cart rolls down the ramp because the forces acting
on the cart are balanced.
Two cars with different masses travel at the same speed down a hill toward a stop sign.
What will happen when both cars apply brakes at the same time to stop?
AThe car with the smaller mass will require less force to stop than the car
with the larger mass.
BThe car with the larger mass will maintain its velocity while traveling
down the hill.
CThe car with the smaller mass will take longer to stop than the car with
the larger mass.
DThe car with the larger mass will have less inertia than the car with the
A car travels at a constant speed of 15m/s for 2 minutes. The car increases its speed from 15 to 25 m/s during the next minute and then travels at a constant speed of 25m/s for 2 more minutes.
Which of the following graphs best represents the car’s motion during this 5-minute period?
A student walks 2 km in 30 minutes. What is the student’s average speed in km/h?
Record your answer and fill in the bubbles on your answer document.
Be sure to use the correct place value.
28. The graph shows the speed of a car traveling east over a 12-second period on a
29.Four professional bowling balls weigh 4,5, 6 and 7 kg. Which bowling ball would