Finding Force

What type of force was at work in the parachute?

• elastic spring force

• frictional force (air resistance)

• magnetic force

• gravitational force

[Select all that apply] Which of these serve as evidence for balanced forces?

• object is turning

• object is moving with constant motion

• Fnet = 0

• object is speeding up

Which grocery basket would have greater acceleration

• 
• 
• 
• 

The amount of momentum is determined by how fast an object is moving and its

• speed.

• mass.

• velocity.

What is net force on an object sitting still?

• 0 N

• 20 N

• There are no forces applied to an object sitting still

• Cannot be calculated

In order to slow down a person falling in the air, you must

• increase the air resistance.

• decrease the air resistance.

How much force does it take to lift a 17kg object?

• 16.6N

• 116N

• 166.6N

• 166N

Frictional force is in a direction that is ________ to the motion of an object.

• identical

• opposite

• perpendicular

• normal

You try to push your laptop across a table but it is not moving. What force might prevent the laptop from sliding?

• friction

• gravity

• magnetism

• normal

The constant velocity of a falling object when air resistance equals force of gravity?

• free fall

• terminal velocity

• average velocity