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3.13 Science Review

Total questions: 18

Worksheet time: 18mins

Name
Class
Date
1.

An object has a mass of 42kg and an acceleration of 14.8m/s^2. What is the force caused by it? (Force= mass times acceleration)

a)

600N

b)

621.6N

c)

670.5N

d)

42kg

2.

An object has an initial velocity of 0m/s and a final velocity of 11m/s. It made the increase in 10s. What is the acceleration? (acceleration=change in velocity divided by time)

a)


1.1 ms21.1\ \frac{m}{s^2}

b)

11m/s

c)

10s

d)

12m/s

3.

If the arrows on a free body diagram are not the same, the forces are:

a)

balanced

b)

Newtons

c)

unbalanced

d)

strong

4.

If an object is acted on by an unbalanced force it will:

a)

accelerate

b)

crash

c)

stay still

d)

inertia

5.

When an object moves, stops moving, changes speed, or changes direction, scientists describe that condition as:

a)

unbalanced forces

b)

correct

c)

balanced

d)

force

6.

An object is seen to either speed up, slow down, or chage direction due to:

a)

inertia

b)

Newton's Laws

c)

unbalanced forces

d)

being yeeted

7.

A window washer or tightrope walker who does NOT want to change their position wants the forces acting on them to be:

a)

balanced

b)

unbalanced

c)

fast

d)

strong

8.

The universal force that exists between any objects with mass, and is the force that every mass exerts on every other mass:

a)

inertia

b)

electricity

c)

gravity

d)

liquid

9.

Kepler's investigations of the movement of the planets explained that:

a)

Earth is not the center of the universe

b)

Forces are balanced

c)

Unbalanced force

d)

Inertia

10.

In the formation of the solar system, __________ pulled particles of gas and dust together to form planets.

a)

Earth

b)

The Sun

c)

space

d)

gravity

11.

What is Newton's Second Law?

a)

When an object experiences a net force, it will accelerate at a rate determined by its mass

b)

Inertia

c)

Unbalanced Forces

d)

When an object accelerates, it will speed up

12.

According to Newton's 2nd law, when the net force on an object decreases, the acceleration:

a)

also decreases

b)

increases

c)

is the same

d)

is gravity

13.

When a bat hits a ball, the impulse is:

a)

inertia

b)

the force multiplied by the time the objects are in contact

c)

mass times acceleration

d)

velocity divided by time

14.

When a force is applied to an object for an amount of time it is known as:

a)

force

b)

inertia

c)

baseball

d)

impulse

15.

A baseball starts with a speed of 30m/s, and has a final velocity of -40m/s. What is the change in velocity? |-40-30|=___

a)

70m/s

b)

40m/s

c)

30m/s

d)

10m/s

16.

A baseball has a starting velocity of 20m/s and it is hit with a final velocity of -30m/s. What is the change in velocity? |-30-20|= ______

a)

20m/s

b)

50m/s

c)

30m/s

d)

10m/s

17.

In an elastic collision:

a)

energy is lost as heat

b)

kinetic energy is lost as light

c)

there is no loss of kinetic energy in the collision

d)

the energy is lost in space

18.

A collision where energy is lost as sound, heat, etc. is known as:

a)

inelastic

b)

elastic

c)

force

d)

explosion