- If a 64 kg runner is accelerating at how much force must he be putting on the ground each time he takes a step?

25.6 N

32 N

128 N

160 N

- As a swimmer pushes water behind him, the water pushes him forward. This is an example of

Newton’s third law of motion

Newton’s second law of motion

Newton’s fourth law of motion

Newton’s first law of motion

- How will the mass of a rocket change when it has reached outer space?

The rocket will have more mass.

The rocket will have less mass.

It depends on how far out in space the rocket travels.

The rocket’s mass will not change.

- On any given surface, a block will keep sliding without stopping or slowing down because of inertia.

true

false

- Block A is bigger and weighs more than Block B. The two blocks are sitting next to each other on a flat surface. Which of the following must be true?

Block A has less volume than Block B.

Block B has more friction than Block A.

Block B has less velocity than Block A.

Block A has more gravity pulling on it than Block B.

- Joseph’s company claims it can help people lose weight without dieting, exercising, taking medication, or having an operation. They just have to move somewhere else in the solar system. Where would they have to move?

to a mysterious new planet, where gravity is the same

to the moon, where gravity is weaker

to Jupiter, where gravity is stronger

- Eric and his bike together weigh 55 kg. If Eric puts on his brakes and decelerates at , what is the force of his brakes?

2200 N

40 N

0.72 N

1.375 N

- Who can rollerblade faster—Jenny, who can go 50 m in 30 s, or Jack, who can go 60 m in 40 s?

They travel at the same speed.

Jenny

Jack

It is impossible to tell with the information provided.

- A swimmer is working on decreasing the time it takes him to do laps. He works from swimming 1.5 m in 30 s to 1.8 m in 30 s. What is the difference in velocities of this swimmer?

0.06 m/s

0.11 m/s

0.05 m/s

0.01 m/s

Use the following story to answer the next two questions.

Mario is driving 60 mph on the freeway, but he needs to pass a large truck. In order to pass the truck he accelerates for 10 seconds. When he is finished accelerating he is going 80 mph.

- What was Mario’s acceleration rate?

60 mph/s

20 mph/s

2 mph/s

10 mph/s

- How did Mario’s acceleration affect his velocity?

His velocity became faster.

His velocity did not change.

His velocity became slower.

- Nancy is training for a marathon. She jogs 10 miles straight south of her home each morning. It takes her 80 minutes. Assuming she runs at constant speed, what is Nancy’s velocity?

12.5 miles/minute

8 miles/minute

0.125 miles/minute

1.25 miles/minute

- Which force causes a feather to fall more slowly than a softball?

inertia

gravity

air resistance

momentum

- It is easier to stop a slow moving train than it is to stop a fast moving train. This is an example of which law of motion?

Newton’s second law of motion

Newton’s fourth law of motion

Newton’s third law of motion

Newton’s first law of motion

- In a tug-of-war between a team of girls and a team of boys, if the girl team starts pulling the rope towards them, how could we describe the force of the girl team?

It is a balanced force.

It is a net force.

It is a weaker force.

They aren’t creating a force.

- Sue was driving Melissa to the store when she suddenly put on her brakes so she wouldn’t hit a cat. Melissa’s body flew forward, causing her to hit her head on the dashboard. Which of Newton’s laws best explains why Melissa kept moving forward when the car stopped?

Newton’s fourth Law of Motion

Newton’s second law of motion

Newton’s first law of motion

Newton’s third law of motion

- Which of the following cars is accelerating?

a slow moving car

a car that is slowing down

a fast moving car

a car that is not moving

- What mass must an object have if an 80 N force accelerates it ?

0.125 kg (125 g)

800 kg

70 kg

8 kg

- In a tug-of-war between a team of girls and a team of boys, if the rope is not moving, how would we describe the force of the boy team?

It is a balanced force.

They aren’t creating a force.

It is net force.

It is a weaker force.

## Answers (3)

NO!

NOT a fing FARMING question!

What's in it for me?

why don't you show us your answers...