8.7 B Check #1

A car accelerating when the traffic light turns green.

A book remaining at rest on a table until someone moves it.

A rocket launching into space.

A ball rolling down a hill.

When the puck speeds up after it is hit

When the puck hovers on the air before it is hit

When the puck collides with the table and the table exerts a force on the puck

Objects in motion stay in motion.

For every action, there is an equal and opposite reaction.

Force equals mass times acceleration.

Objects at rest stay at rest.

The wall pushes back with equal force, propelling the swimmer forward.

The swimmer moves backward due to the force of gravity.

The swimmer remains stationary due to balanced forces.

The swimmer accelerates downward due to water resistance.

A car stopping at a red light.

A person jumping off a boat causing the boat to move in the opposite direction.

A satellite orbiting Earth.

A ball thrown straight up into the air.

Newton’s third law of motion states that when the skateboarder pushes on the ground, the ground pushes back on the skateboarder.

Newton’s second law of motion states that the acceleration of the skateboarder decreases as the net force increases.

Newton’s first law states that the skateboarder accelerates because the forces on the skateboarder are balanced.

For every action, there is an equal and opposite reaction.

An object remains at rest or in uniform motion unless acted upon by an external force.

The acceleration of an object is directly proportional to the net force and inversely proportional to its mass (F = ma).

$$0 \, \text{N}$$

$$10 \, \text{N}$$

$$98 \, \text{N}$$

$$100 \, \text{N}$$

The tendency of an object to resist changes in its state of motion.

The force required to accelerate an object.

The energy stored in an object due to its position.

The rate of change of velocity.