WorksheetsCh5 Dynamics
Total questions: 23
Worksheet time: 13mins
Name
Class
Date
1.
A _________ is defined as a PUSH or PULL on a system.
a)
Motion
b)
Force
c)
Friction
d)
Gravity
2.
What will happen if these boys are pulling with the same amount of force?
a)
The boy in blue will win.
b)
They will not move at all.
c)
The boy in red will win.
d)
Both will fall down.
3.
This type of force pushes or pulls on another object by touching it
a)
contact
b)
gravity
c)
friction
d)
fundamental
4.
The unit of force is
a)
m/s
b)
m/s2
c)
newton
d)
kg
5.
What is the force needed to accelerate a 30 kg object at 2 m/s2? F = ma
a)
15 N
b)
30 N
c)
60 N
d)
2 N
6.
Which of these is a Contact force?
a)
Gravity
b)
Electric
c)
Shear
d)
Magnetic
7.
If a force of 30 N is applied to a mass of 6 kg, what is the acceleration? F = ma
a)
5 m/s2
b)
6 m/s2
c)
30 m/s2
d)
180 m/s2
8.
Which of Newton's law states that if you push against a wall, the wall is actually pushing back against you?
a)
1st Law
b)
2nd Law
c)
3rd Law
d)
None of these
9.
Which is an example of torsion?
a)
pulling on a rope
b)
squeezing water from a towel
c)
sliding a box across the floor
d)
turning a door knob
10.
What is the force needed to accelerate a 48 kg object at 0.5 m/s2? F = ma
a)
6 N
b)
24 N
c)
96 N
d)
12 N
11.
According to Newton’s First Law of Inertia, what will happen to a ball thrown in space ?
a)
It will travel in a straight line forever.
b)
It will travel in a straight line but eventually slow down.
c)
It will continue to speed up forever.
d)
It will slow down and change direction.
12.
If a force of 36 N is applied to a mass of 6 kg, what is the acceleration? F = ma
a)
5 m/s2
b)
6 m/s2
c)
30 m/s2
d)
180 m/s2
13.
Which is an example of a compression force?
a)
Pulling a child's wagon
b)
Hitting a baseball
c)
Tearing open a snack bag
d)
Turning a dial on the kitchen stove
14.
For every action, the reaction is
a)
greater than the mass of the object
b)
equal and opposite
c)
equal and constant
d)
less than the force of gravity
15.
What does it take to change the direction or speed of an object?
a)
More than one force
b)
An unbalanced force
c)
A balanced force
d)
No force
16.
What forces are acting on the box someone is pushing across the floor?
a)
Friction from the floor.
b)
Gravity pushing down on the box.
c)
The floor pushing up on the box.
d)
All of the above
17.
Which of Newton's laws explains an empty cart needs a small force to accelerate it but a full cart needs more of a force to accelerate it?
a)
1st Law
b)
2nd Law
c)
3rd Law
d)
Who is Newton?
18.
The weakest of the four fundamental forces is:
a)
Gravity
b)
Electromagnetism
c)
Strong Nuclear
d)
Weak Nuclear
19.
_____________ is the force that binds protons together in the nucleus of an atom.
a)
Gravity
b)
Electromagnetism
c)
Strong Nuclear
d)
Weak Nuclear
20.
The strongest of the four fundamental forces is:
a)
attraction between all objects made of matter
b)
attraction between + and - electrical charges
c)
force that keeps an atom from splitting apart
d)
force that keeps a neutron from splitting apart
21.
Which of the following is an example of a non-contact force?
a)
Friction
b)
Gravity
c)
Compression
d)
Tension
22.
If a 10 kg object accelerates at 3 m/s2, what is the net force acting on it? F = ma
a)
30 N
b)
13 N
c)
10 N
d)
3 N
23.
Which of Newton's laws explains why you feel a jolt backward when a car suddenly moves forward?
a)
1st Law
b)
2nd Law
c)
Law of Gravity
d)
3rd Law
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