Forces

Forces

9th - 12th Grade

20 Qs

quiz-placeholder

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Forces

Forces

Assessment

Quiz

Physics

9th - 12th Grade

Practice Problem

Easy

Created by

Alia Jackson

Used 14+ times

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A 60.-kilogram astronaut weighs 96 newtons on the surface of the Moon. The acceleration due to gravity on the Moon is

9.8 m/s2

1.6 m/s2

4.9 m/s2

0.0 m/s2

Answer explanation

a = F/m

a = 96N/60kg

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which graph best represents the motion of an object that has no unbalanced force acting on it?

Media Image
Media Image
Media Image
Media Image

Answer explanation

No unbalanced force means the object is in equilibrium. If it is moving, then it must be moving with a constant velocity. Only the displacement-time graph shows constant velocity.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A table exerts a 2.0-newton force on a book lying on the table. The force exerted by the book on the table is

0 N

2.0 N

0.20 N

20. N

Answer explanation

An object at rest on a flat surface, the normal force equals the weight. Also, Newton's 3rd Law.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A 1.0 x 102-kilogram box rests on the bed of a truck that is accelerating at 2.0 meters per second2. What is the magnitude of the force of friction on the box as it moves with the truck without slipping?

2.0 x 102 N

0.0 N

1.0 x 103 N

5.0 x 102 N

Answer explanation

If the box is not moving, friction must be balancing the forwards for the truck is exerting on the book. The forwards force is equal to mass x acceleration, 1.0 x 102 kg x 2 = 2 x 102N

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The weight of an apple is closest to

10-2 N

100 N

104 N

102 N

Answer explanation

You must remember the weight of an apple is about 100g = 0.1kg. Weight = mg = (0.1kg)(9.81m/s2) = 0.981N, about 1N. 100 is equal to 1.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

In the diagram below, the weight of a box on a plane inclined at 30.o is represented by the vector W. What is the magnitude of the component of the weight (W) that acts parallel to the incline?

1.5W

W

0.50W

0.87W

Answer explanation

Parallel component is Fgsinθ = Wsin300 = 0.50W

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

The diagram below represents a car resting on a hill. Which vector best represents the weight of the car?

A

B

C

D

Answer explanation

Weight always acts straight down

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