Forces and Momentum

According to the "Law of ----------------------", momentum is conserved in collisions with more than two objects if there are no external forces acting on the objects.

• conservation of energy

• conservation of mass

• conservation of momentum

• conservation of education

Tags

NGSS.HS-PS2-2

Two students are playing on skateboards. The first student and their skateboard have a combined mass of 99.2 kg. The second student and their skateboard have a combined mass of 42.3 kg. The two students stand still on their skateboards facing each other and then push off on each other as hard as they can. Refer to the information and diagram shown above. Using the law of conservation of momentum, what is the speed of the second student? P=MV

• 2.35 m/s

• 3.20 m/s

• 7.50 m/s

• 13.2 m/s

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

When riding in a car, you will lean toward the right when the car makes a left turn. Which of Newton's Laws does this demonstrate?

• Newton's law of inertia

• Newton's law of force and acceleration

• Newton's law of action-reaction

• Newton's universal law of gravity

Which statement below best describes the motions of a small car and a school bus that have an equal amount of force applied?

• The small car and school bus will have an equal acceleration.

• The bus will have a greater acceleration than the small car.

• The small car will have a greater acceleration than the bus.

• The small car will accelerate forward while the bus accelerates in the opposite direction.

Tags

NGSS.MS-PS2-2

When the air in the balloon is released, the rocket will move forward. Which of the following statements best describes the force that cause the motion in the situation explained above?

• The force of the balloon is pushing up on all sides as the air is released.

• The air outside the balloon pushes the balloon forward as it opposes the released air.

• The force of the released air is pushing backwards as the balloon gets smaller.

• The gravitational force is pulling down on the balloon as the air is released.

Tags

NGSS.MS-PS2-1

A student is playing pool. He causes the 0.16 kg ball to move at 9.1 m/s. What is the momentum of the ball? P = M x V

• 0.02 kg • m/s

• 1.5 kg • m/s

• 9.3 kg • m/s

• 57 kg • m/s

A toy car starts at rest, and then a force is applied to it which causes it to move as seen in the diagram above. What force is being applied to the car shown?

• A balanced force to the right

• A balanced force to the left

• An unbalanced force to the right

• An unbalanced force to the left

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A tennis ball with a mass of 0.45 kg is served at a velocity of 40 m/s towards the west. A bowling ball with a mass of 15 kg is rolled down the lane at a velocity of 1 m/s towards the east.

Which of the following statements is most likely to occur when the tennis ball and bowling ball collide?

• The tennis ball will roll backwards because the bowling ball is heavier giving it more momentum.

• The two moving balls will collide and stay in place because they have the same momentum.

• The bowling ball will roll backwards because the tennis ball has the greater momentum despite having a smaller mass.

• Both the tennis ball and bowling ball will bounce backwards because every action has an equal and opposite reaction.

Tags

NGSS.MS-PS2-1

With the same force applied, which of these will have a greater acceleration?

• 100 gram mass

• 200 gram mass

• 300 gram mass

• All the objects would have the same acceleration.

Tags

NGSS.MS-PS2-2

At which of the following distances do two 10.0 kg objects have the greatest gravitational attraction on each other?

• 1.4 m

• 15.6 m

• 22.1 km

• 3,434 km

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5