8.1.3 Colliding Objects

Two balls in a vacuum chamber are dropped simultaneously from different heights. Which characteristic will be the same for both the balls throughout their motion?

• speed

• velocity

• acceleration

• kinetic energy

According to Newton's second law of motion, upon what two factors does the acceleration of an object depend?

• the velocity of the object and the amount of force applied it

• the mass and weight of the object

• the mass of the object and the amount of force applied to it

• the speed and direction that the object is moving

Tags

NGSS.MS-PS2-2

Mass is a measure of which of the following quantities?

• energy

• matter

• space

• motion

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NGSS.MS-PS1-1

NGSS.MS-PS1-5

Newton's third law of motion states that _______________.

• for every action, there is an equal and opposite reaction

• an object at rest will stay at rest or an object in motion will stay in motion with a constant velocity

• acceleration is directly proportional to the magnitude of the force acting on it and inversely proportional to the mass of the object

• whenever an object is falling, gravity pulls it down

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NGSS.MS-PS2-1

Which of the following would not be an action-reaction pair according to Newton's third law of motion?

• An oar pushes the water, and the water pushes the oar.

• A dog wags its tail, and the tail wags the dog.

• A missile pushes a gas, and the gas pushes the missile.

• A boy sits in a chair, and the floor pushes the boy.

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NGSS.MS-PS2-1

Forces that are equal in magnitude but opposite in direction will:

• have no effect on the motion of an object.

• cause an object to change its direction of motion.

• cause an object to increase its speed.

• cause an object to decrease its speed.

If two opposite forces act on a stationary object at the same time, and one is stronger than the other, which way will the object move?

• It will move toward the stronger force.

• It will move toward the weaker force.

• It will move at right angles to the two forces.

• It will not move.

Tags

NGSS.3-PS2-1

NGSS.3-PS2-2

Which of the following best completes this sentence? In every interaction, forces occur in ___________.

• specific places

• single units

• one direction only

• pairs

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NGSS.MS-PS2-1

Suppose that you strike a nail with a hammer. What effect does the nail have on the hammer?

• The nail has no effect at all on the hammer.

• The nail pushes back against the hammer.

• The nail gives the hammer momentum.

• The nail transfers energy to the hammer.

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NGSS.MS-PS2-1

Suppose a rock is sitting on a table. Which statement below best describes the forces involved?

• No forces are acting on the rock or table because neither is moving.

• The rock is exerting a downward force on the table, but the table is not exerting a force.

• The table is exerting an upward force on the rock, but the rock is not exerting a force.

• The rock is exerting a downward force on the table, and the table is exerting an upward force on the rock.

Tags

NGSS.MS-PS2-2