Newton’s Laws. 4B investigate and describe [applications of] Newton’s laws such as in vehicle restraints, sports activates, geological processes, and satellite orbits;. Newton’s First Law of Motion. Law of Inertia An object in motion remains in motion or an object at
4B investigate and describe [applications of] Newton’s laws such as in vehicle restraints, sports activates, geological processes, and satellite orbits;
Law of Inertia
rest remains at rest unless acted on by an unbalanced force.
With seat belt.
Without seat belt.
accelerate in the direction of the net force.
(Newton’s Second Law)
a = 3 m/s2 FNet = m x a
2 kg x 3 m/s2 = 6 N
Action: Rocket pushes gases down.
Reaction: Gases push rocket up.
1. The picture above shows the directions in which water leaves this scallop’s shell. Which picture below shows the direction the scallop will move?
2. A wet bar of soap slides 1 meter across a wet tile floor without appearing to slow down. Which of these statements explains why the bar of soap fails to slow down?
3. A hockey player pushed a puck toward the opposite side of a level ice rink. The player expected the puck to continue all the way across the ice, but the puck slowed and stopped before reaching the other side. Which of these best explains why the puck failed to slide all the way to the opposite side?
4. The frog leaps from its resting position at the lake’s bank onto a lily pad. If the frog has a mass of 0.5 kg and the acceleration of the leap is 3 m/s 2, what is the force the frog exerts on the lake’s bank when leaping?
6. After shooting a cannonball, a cannon recoils with a much lower velocity than the cannonball. This is primarily because, compared to the cannonball, the cannon has a —
8. When the air is released from a balloon, the air moves in one direction, and the balloon moves in another direction. Which statement does this situation best illustrate?
10. An athlete sitting in a wheelchair at rest throws a basketball forward. Since the athlete and the wheelchair have greater mass than the basketball has, the athlete and the wheelchair will —
12. The pictures show how an air bag functions in a collision. How much momentum in kg m/s does the air bag absorb from the crash-test dummy if all the crash-test dummy’s momentum is absorbed by the air bag? Record and bubble in your answer to the nearest whole number on the answer document.
13. How many newtons of force does a 50.0 kg deer exert on the ground because of gravity? Record and bubble in your answer on the answer document.