Which of the following is NOT one of Newton's Laws?

Something that is thrown up must eventually come back down

What is the normal force?

A force that prevents solid objects from passing through each other

Which of the following statements about gravity on Earth is true

Gravity applies the same acceleration but different weights to objects

You are riding in a car without a seatbelt when the car suddenly comes to a stop. You are thrown to the front because...

You have inertia and continue to move forwards until a force stops you

A crate is being lifted by a rope at a constant speed. How does the tension from the rope compare to the crate's weight?

The tension is equal to the weight

Which is the best description of what mass measures?

How resistant an object is to acceleration

The coefficient of friction (μ) represents

The roughness/texture of an object

The pulley setup is repeated, this time with an extra pulley and block set up on top. Friction exists on blocks A and C

FgB - ftable - 2fAC= (ma + mb + mc)a

What is the best description of friction?

A force that always tries to prevent sliding

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Forces Quiz

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Questions 15

Answers

1
When a horse pulls on a wagon, the wagon pulls back on the horse with just as much force. How is the horse able to move?
Because the horse weighs less than the wagon
Because the horse has less mass than the wagon
Because there is no friction on the wagon wheels
The ground pushes on the horse
2
Which of the following is NOT one of Newton's Laws?
An unbalanced force is require for an object to accelerate
ΣF = ma
Forces are an interaction experienced equally between two objects
Something that is thrown up must eventually come back down
3
What is the normal force?
A force from the ground always directed upwards
The equal and opposite force opposing gravity
A force that prevents solid objects from passing through each other
The force that is normally there
4
An object's weight in physics is measured in...
Pounds
Newtons
Grams
Kilograms
5
Which of the following statements about gravity on Earth is true
Gravity applies different accelerations and weights to objects
Gravity applies different accelerations but equal weights to objects
Gravity applies the same acceleration and weight to objects
Gravity applies the same acceleration but different weights to objects
6
You are riding in a car without a seatbelt when the car suddenly comes to a stop. You are thrown to the front because...
Because of newton's 3rd law, when the car feels a brake force you do too
Aliens?
You have inertia and continue to move forwards until a force stops you
A force is applied to you in the stop, pushing you to the front
7
A crate is being lifted by a rope at a constant speed. How does the tension from the rope compare to the crate's weight?
The tension is less than the weight
The tension is greater than the weight
There isn't enough info to know for sure
The tension is equal to the weight
8
Which is the best description of what mass measures?
How resistant an object is to acceleration
The size of the object
How much an object weighs, typically on Earth
How much friction is acting on an object, preventing motion
9
The coefficient of friction (μ) represents
The roughness/texture of an object
The amount of normal force on an object
a funny looking 'u' with a funky tail on the front side and a weird name
The amount of friction force on an object
10
The pulley setup is repeated, this time with an extra pulley and block set up on top. Friction exists on blocks A and C
FgB - ftable - 2fAC= (ma + mb + mc)a
FgB - ftable - fAC= (ma + mb + mc)a
FgB - ftable = (ma + mb + mc)a
FgB - ftable - 3fAC= (ma + mb + mc)a
11
Which of the following actions would not be possible without friction?
Taking off in an airplane
Jumping
Driving a car
Climbing a ladder
12
Picture a ball falling down through the air. Which equation best matches the situation
Fg = mg
Fg - FN = ma
Fg + FN = ma
Fg - FN = mg
13
What is the best description of friction?
A measurement of an object's inertia, resistance to acceleration
It's coarse and rough and irritating and it gets everywhere
A force that always tries to prevent sliding
A force that always slows an object down
14
A pulley setup is shown below with 2 moving blocks & friction between 'A' and the table. Which equation describes this?
FgB - FgA = (ma + mb)a
FgB + f = (ma + mb)a
FgB + FgA = (ma + mb)a
FgB - f = (ma + mb)a
15
A pulley setup is shown below with friction between 'A' and the table. Friction keeps the system stationary.
mAg = μmAg
mBg = mAg
g = μmAg
mBg = μmAg

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