Forces and Gravity

Jessica has two balls. One ball has a mass of 1 kg. The other ball has a mass of 2 kg. She pushes each with a force of 100 N. How does the acceleration of the two balls compare?

• The 1-kg ball accelerates the same as the 2-kg ball.

• The 1-kg ball accelerates half as much as the 2-kg ball.

• The 1-kg ball accelerates twice as much as the 2-kg ball.

• The 1-kg ball accelerates four times as much as the 2-kg ball.

Tags

NGSS.MS-PS2-2

What is the gravitational force acting on an object that has a mass of 10.0 kg?

• 0.2 kg·m/s ²

• 9.8 kg·m/s ²

• 10.0 kg·m/s ²

• 98.0 kg·m/s ²

Tags

NGSS.MS-PS2-2

What is gravity?

• the force that pushes all objects toward Earth

• the force that pulls all objects toward one another

• a magnetic force that is strongest at Earth’s poles

• a stream of charged particles from the sun to Earth

Tags

NGSS.MS-PS2-4

The objects shown in the following diagrams have different masses and are different distances apart. Which diagram shows the two objects that have the greatest gravitational force between them?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-4

This force holds us to earth’s surface.

• friction

• mass

• gravity

• tension

Tags

NGSS.MS-PS2-4

What force is acting on the cat at the end?

• Gravity

• Friction

• Momentum

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Which model has greater gravitational attraction (if any)

• Model A

• Model B

• Both Model A and Model B (same gravity)

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Which forces does this train have to overcome to reach its maximum speed?

• electricity, friction, and air resistance

• gravitational, magnetic, normal force

• tension, spring, friction

• friction, air resistance, gravitational

Tags

NGSS.MS-PS2-2

Force = mass × acceleration due to gravity (F = mg), where g is about 9.8 m/s2.

• true

• false

Tags

NGSS.MS-PS2-2

What is the net force toward the right on the box?

• 0

• 50

• 100

• 2500

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2