# Newton's First Law Review

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A review of the basic concepts associated with Newton's First law such as Inertia,net Force and equilibrium

• 1.

### Newton's First law is also known as the law of...

• A.

Movement

• B.

Complication

• C.

Inertia

• D.

Inability

• E.

Equal and oopposite forces

C. Inertia
Explanation
Newton's First Law states that an object at rest will remain at rest, and an object in motion will continue in motion with a constant velocity, unless acted upon by an external force. This concept is known as inertia, which refers to the tendency of an object to resist any change in its state of motion. Therefore, the correct answer is inertia.

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• 2.

### An object in motion will _____________________ if the Net force acting on it is____

• A.

Stay in motion, 0 N

• B.

Accelerate, 0 N

• C.

Stay in motion,greater than 0 N

A. Stay in motion, 0 N
Explanation
Newton's first law is defined as an object in motion will stay in motion if the net fore acting on it is 0N

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• 3.

### If an object is in equilibrium its acceleration is _________ and its Net force is _____

• A.

Non-zero, non-zero

• B.

Zero,non-zero

• C.

Zero, zero

• D.

Non-zero,zero

C. Zero, zero
Explanation
If the net force = 0 N, then the objects acceleration = 0 N. No net force = no acceleration

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• 4.

### Johnny pushes with a force of 50 N to the left, Jill pushes on the car with  a force of 75 N to the right. What is the net force acting on the object?

• A.

125 N

• B.

100 N

• C.

50 N

• D.

25 N

• E.

0 N

D. 25 N
Explanation
When fores are going in opposite directions, you subtract ( or add a negative)- FNET= 75N - 50 N

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• 5.

### Johnny pushes with a force of 50 N to the left, Jill pushes on the car with  a force of 75 N to the right. Is the object in equilibrium?

• A.

Yes

• B.

No

• C.

Maybe

B. No
Explanation
If the net force is not zero, The object is not in equilibrium

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• 6.

### An object is moving at a constant velocity. If the Car requires 1000 N of force to propel it forward, What is the magnitue of the frictional force acting on the car?

• A.

0 N

• B.

500 N

• C.

1000 N

• D.

1500N

• E.

1000 N

C. 1000 N
Explanation
Since it is moving at a constant spee, the Net force on it )n, Which means it must be balanced by a force that is equal and opposite to the applied force

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• 7.

### An object is moving at a constant velocity. If the Car requires 1000 N of force to propel it forward, Is the car in equilibrium?

• A.

Yes

• B.

No

• C.

Maybe

A. Yes
Explanation
yes, Equilibrium describes constant motion. An object moving at a constant or uniform velocity is in equilibrium

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• 8.

### What is the approximate weight of a 10 kg dog?

• A.

1 N

• B.

10 N

• C.

100N

• D.

1000 N

C. 100N
Explanation
w=mg, w= 10kg *9.8m/s^2= 980N= 1000N

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• Current Version
• Mar 21, 2023
Quiz Edited by
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• Nov 21, 2009
Quiz Created by
Barbvanatta

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