Forces

We often say that g = 9.8 m/s². The lowercase g represents:

• the speed of gravity

• the velocity of gravity

• the acceleration of gravity

• the force of gravity

An object has a mass of 10 kg. What is its weight?

• 0.98 kg
• 0.98 N
• 98 kg
• 98 N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Fill in the blanks: _____ does not change from place to place, but _____ can change because of differences in the strength of gravitational pull.

• acceleration, weight
• weight, acceleration
• mass, weight
• weight, mass

Tags

NGSS.MS-PS2-4

An unbalanced force causes:

• change in mass
• acceleration
• balanced forces
• change in time

Tags

NGSS.MS-PS2-2

A child pulls on a toy with a force of 25 N to the right. Another child pulls the toy with 15 N to the left. The net force is:

• 1.7 N to the right
• 1.7 N to the left
• 10 N to the right
• 10 N to the left

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Gravity pulls an object down with 49 N of force and a rope pulls the object up with 50 N of force. What is the net force?

• 1 N upward
• 1 N downward
• 0.98 N upward
• 0.98 N downward

Tags

NGSS.MS-PS2-2

The air resistance and weight as shown for the skydiver are balanced. The skydiver is probably:

• at rest
• moving at constant velocity
• accelerating upward
• accelerating downward

Tags

NGSS.MS-PS2-2

A box is pushed left with 35 N and right with 40 N of force. The box has a mass of 5 kg. What is the acceleration?

• 5 m/s²
• 1 m/s²
• 25 m/s²
• 8 m/s²

Tags

NGSS.MS-PS2-2

When an object is moving, friction acts in the _______ direction as the motion.

• perpendicular

• same

• opposite

• precise

Tags

NGSS.MS-PS2-2

What type of force is inertia?

• Contact
• Field
• Not a force

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2