Force and Motion Review: Balanced/Unbalanced Forces

What will happen to an object in motion with no unbalanced force acting on it?

• It will continue to accelerate until it reaches the speed of light.

• It will gradually slow down and come to a rest.

• It will continue to move at a constant speed.

• It will initially accelerate but gradually slow down until it comes to a rest.

Lee pushes on a wall to stretch after a long run. He pushes on the wall with 20 N of force, yet the wall does not move. Which term best describes the forces in this scenario?

• unbalanced forces

• gravitational forces

• directional forces

• balanced forces

What term represents the strength of a force?

• direction

• inertia

• friction

• magnitude

Under what condition will a bowling ball slow down if it is rolling down a bowling lane at a constant speed?

• The mass of the ball is reduced.

• The direction of the ball is changed.

• An accelerating force is applied to the ball.

• An unbalanced external force is applied to the ball.

Tags

NGSS.MS-PS2-2

A car being pushed to the right with a force of 150 N encounters a frictional force of 50 N to the left. What is the magnitude of the net force acting on the car?

• toward the left

• toward the right

• 100 N

• 200 N

Tags

NGSS.MS-PS2-2

Two teams (1 and 2) were playing a game of tug-of-war, and each applied an equal force in opposite directions. How will the rope most likely be affected by the applied forces?

• The rope will not move.

• The rope will shrink in length.

• The rope will move towards team 1.

• The rope will move towards team 2.

Tags

NGSS.MS-PS2-2