Forces and Momentum

An object's momentum can be defined as an object's:

• mass times its acceleration

• mass times its velocity

• force times its acceleration

• force times the time interval

Tags

NGSS.HS-PS2-2

As an object falls through the air, the forces acting on the object are:

• air resistance and fluid friction

• gravity and air resistance

• gravity and static friction

• weight and rolling friction

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Is the following situation an example of balanced or unbalanced forces:

You are in a tug-of-war match with your twin and it is a tie.

• Balanced

• Unbalanced

Is the following situation an example of balanced or unbalanced forces:

A box that weighs 60-N falls through the air and encounters 80-N of air resistance.

• Balanced

• Unbalanced

Tags

NGSS.MS-PS2-2

Is the following situation an example of balanced or unbalanced forces:

A worker is pushing a crate with a 42-N force, and friction is resisting with 20-N.

• Balanced

• Unbalanced

Tags

NGSS.MS-PS2-2

What is the net force?

• 65 N left

• 65 N right

• 35 N left

• 35 N right

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

If a 10 kilogram object accelerates suddenly at 15 m/s^2, approximately how much force was applied to the object?

• 150 Newtons

• 15 Newtons

• 150 kilograms

• 100 kilograms

Tags

NGSS.MS-PS2-2

A 50 kg skater pushed by a friend accelerates 5 m/s². Approximately how much force did the friend apply?

• 250 N

• 250 m/s²

• 250 kg

Tags

NGSS.MS-PS2-2

If balanced forces are acting on a box, is it accelerating?

• Yes

• No

The sum of all forces acting on an object and direction is called the

• Balanced Force

• Net Force

• Unbalanced Force

• Contact Force

Tags

NGSS.MS-PS2-2