Forces

How can you increase the movement of an object?

• decrease its mass

• increase its friction

• increase its mass

• decrease the force applied to it

Traveling a distance of 720 miles in 12 hours a person would have an average speed of.....(hint: speed = distance divided by time)

• 70 miles an hour (mph)

• 65 miles an hour (mph)

• 55 miles an hour (mph)

• 60 miles an hour (mph)

One way to reduce friction is to

• make a smooth surface
• make a surface rough

One way to make more friction between two objects is to

• Make the surface smoother
• Make the surface rougher

Unbalanced forces pushing on an object cause the object to _____.

• remain motionless

• move at constant velocity

• speed up, slow down, or change direction

A book resting on a desk is an example of _____.

• balanced forces

• unbalanced forces

TRUE or FALSE: If you wish to speed up, slow down, or change direction in your car, you need to apply an UNBALANCED force to the car.

• TRUE
• FALSE

Forces are measured in _____.

• kilograms
• seconds
• meters
• newtons

Total distance divided by total time is

• average speed
• constant speed
• instantaneous speed
• acceleration

Shona cycles at an average speed of 8km/h. How far has she travelled if she cycles for 4 hours?

• 55km
• 32km
• 43km
• 32miles