Lesson 1: Motion

Multiple Choice

The use of inclined planes allowed Galileo to challenge Aristotle's ideas. In doing so, Galileo discovered...

• speed

• inertia

• gravity

• charge

Multiple Choice

What do we call the accounting of how much 'stuff' is present in an object?

• mass

• speed

• volume

• charge

Multiple Choice

The concept of inertia directly involves...

• energy

• mass

• weight

• volume

Multiple Choice

True or False?

The mass of an object changes if you move it from the Earth to the Moon

• true

• false

Multiple Choice

True or False?

The weight of an object changes if you move it from the Earth to the Moon

• true

• false

Multiple Choice

The density of 1 kg of iron is...

• the same as the density of 100 kg or iron

• more dense than 100 kg of iron

• less dense than 100 kg of iron

Multiple Choice

The weight of 1 kg of iron is...

• heavier on the Earth than the Moon

• lighter on the Earth than the Moon

• unchanged regardless of the iron's location

Multiple Choice

A bowling ball is in equilibrium when it...

• is at rest

• moves steadily in a straight line

• either of these two answers can be correct

Multiple Choice

The equilibirum rule, $$\sum_{ }^{ }F=0$$ , applies to...

• vectors

• scalars

• both of the other two answers

Multiple Choice

A cart is pushed to the right with a 15 N force. At the same time, a 20 N is applied to the left. What is the net force on the cart?

• 35 N, right

• 5 N, right

• 5 N, left

• 35 N, right

Multiple Choice

When Nellie pushes a crate across the factory floor at an increasing speed, the force of friction must be...

• less than Nellie's pushing force

• more than Nellie's pushing force

• equal to Nellie's pushing force

Multiple Choice

The force of friction can occur...

• all of these

• in water

• with sliding objects

• with stationary objects

Multiple Choice

An automobile cannot maintain constant velocity when...

• accelerating

• speeding up

• slowing down

• all of these

Multiple Choice

A freely falling object has a velocity of 30 m/s downwards as it passes by your window. Exactly 1 second later how fast will it be moving?

• 20 m/s

• 30 m/s

• 35 m/s

• 40 m/s

Multiple Choice

Acceleration and velocity are actually...

• much the same as each other

• rates, but for different quantities

• the same when direction is not a factor

• the same when the object is in free fall

Multiple Choice

If a freely falling object gains 10 m/s of speed as it falls downwards for each second it is in motion, its acceleration will be...

• 10 m/s/s

• 10 m/s

• both of the other two answers

​Lesson Complete!