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Net force and Newton's Laws Flashcards | StudBud
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Net force and Newton's Laws
Another word for “normal” is parallel
What does “sigma” mean?
Net force and Newton's Laws
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physics
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Answers
1
What does “sigma” mean?
The sum of
The product of
less than
Greater than
2
Another word for “normal” is parallel
True
False
3
What is the normal force of a 14 N object on a table?
14 N
1.4 N
140 N
10 N
4
When drawing a free body diagram, what must be remembered?
All of the above
The magnitude of the forces
The total number of forces on an object
The direction of the forces
5
Which of Newton’s Laws relates force, mass, and acceleration?
1st
2nd
3rd
4th
6
One force is 71N to the west and the other force is 49N to the east. What is the net force?
120 N
71 N
22 N
32 N
7
Of a stationary object, the force of gravity is opposed by
Friction
Air resistance
Weight
Normal force
8
The direction of the acceleration vector is in the opposite direction of the net force.
True
False
9
Which are vectors? I.Force II.Acceleration III.Mass
II only
I and II
I and II and III
I only
10
Inertia is
A universal constant
Tendency to produce a force
Tendency to resist a change in motion
A force
11
If a 2000 kg truck collides with a 900 kg car
Both the forces cancel and are therefore 0
Both the forces are equal
The truck experiences a greater impact force
The car experiences a greater impact force
12
With what force does a boy push a 3 kg box at 8 m/s
2
?
3/8 N
11 N
8/3 N
24 N
13
Which of Newton’s Laws states the summation of forces?
4th
1st
3rd
2nd
14
One force is 3 N to the north and the other force is 9N to the south. What is the net force?
12 N
9 N
6 N
3 N
15
A 4.0 kg object is is pushed with a 24N force > & a 32N force to the <. What is the net force?
56 N
8 N
2 N
4N
16
What is the minimum number of objects present for there to be a force?
One
Two
Four
Three
17
What is the weight of the weight of .005 kg quarter?
45 N
0.45 N
4.5 N
0.045 N
18
Which of the following properties of an object is likely to change on another planet?
Weight
Density
Mass
Volume
19
A 40N force to the right accelerates an object 10 m/s
2
. Find the mass of the object.
4 kg
1 kg
7 kg
10 kg
20
How much force is required to move a 6 kg toy car, at rest to a velocity of 2 m/s in 4 s?
2 N
3 N
0 N
2.5 N
21
Who is the “father of physics”?
Galileo
Einstein
Joule
Newton
22
What is the normal force of a 3 kg book sitting on a table?
2.94 N
29.4 N
0.294 N
0 N
23
If acceleration is 4 m/s
2
and F=20 N, what is mass?
4 kg
100 kg
5 kg
10 kg
24
A 22 N force acts on an object of 1kg. What is the magnitude of acceleration of the object?
120 m/s2
22 m/s2
71 m/s2
32 m/s2
25
If a box is being pulled with 50 N without accelerating which quantity does NOT remain constant
Distance traveled
Gravity
Mass
Velocity
26
Force is a scalar.
False
True
27
A 5 kg block is pulled with a constant velocity at 55 N. Find acceleration.
11 m/s2
10 m/s2
0 m/s2
5 m/s2
28
What are the units of acceleration?
Kg
m/s
Kgm
m/s2
29
What is the force of gravity of a 10 kg ball?
9.8 N
8.9 N
1.1 N
0 N
30
A 4.0 kg object is being acted on by a 8N force. What is the acceleration of the object?
56 m/s2
8 m/s2
4 m/s2
2 m/s2
