Applying Newton's Laws of Motion

In which situation is the object experiencing balanced forces?

• A girl swings on a swing at the playground.

• A car brakes as it approaches a traffic light.

• A sled speeds up as it slides down a snow-covered hill.

• A sky diver reaches terminal velocity when he stops accelerating.

The moon orbits our Earth. The opposite would never be true; the Earth would never orbit the moon. One reason is due to the force of gravity. The object ____________ has a greater gravitational force and that determines what satellites orbit around it.

• with the greater mass

• containing mostly water

• with a thicker atmosphere

• with the greater diameter

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Motion is any change in ___________.

• accelration

• distance

• position

• velocity

• 26.75 kg

• 263.3 kg

• 63.69 kg

• 1123.5 kg

Tags

NGSS.MS-PS2-2

A train rolls to a stop along a horizontal track without the conductor applying the brakes. What answer choice BEST explains why this occurred?

• The train ran out of momentum.

• The opposing force of friction stopped the train.

• The natural state of the train is not to be in motion.

• The force of gravity slowed the train until it stopped.

Tags

NGSS.MS-PS2-2

This graph shows that as an object’s mass increases its

• inertia increases

• inertia decreases

• acceleration increases

• acceleration decreases

What is the net force and the direction of movement?

• 50 Newtons, Left

• 50 Newtons, Right

• 500 Newtons, RIght

• 450 Newtons, LEft

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What law of motion does this picture represent?

• 1st law

• 2nd law

• 3rd law 

Tags

NGSS.MS-PS2-1

As the fuel in a rocket ignites, the force of the gas expansion and explosion pushes out the back of the rocket and pushes the rocket forward.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

Tags

NGSS.MS-PS2-1

When you are standing up in a subway train, and the train suddenly stops, your body continues to go foward.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law