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Duplicate of CHAPTER 4 NEWTONS LAWS -- PHYSICS Flashcards | StudBud
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Duplicate of CHAPTER 4 NEWTONS LAWS -- PHYSICS
Duplicate of CHAPTER 4 NEWTONS LAWS -- PHYSICS
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physics review
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Answers
1
Newton's Third law: For every action force there is __ force
always a contact and frictional
another similar reaction
a gravitational field
an equal and opposite reaction
2
Net force is...
The vector sum of all forces
The force exerted on a fish
The absolute value of all the forces
The sum of forces on one axis
3
Bob stands on a scale going up in an elevator. His weight will appear _____.
lower
the same
twice as much
higher
4
What is the velocity at 4 seconds?
10 m/s
0.4 m/s
4 m/s
2.5 m/s
5
This graph represents a moving bowling ball. What is the acceleration?
2.5 m/s²
10 m/s²
4 m/s²
40 m/s²
6
Considering Newton's second law, which best describes acceleration?
Equal and opposite
F/m
F * m
m * a
7
Equilibrium occurs when ___.
the net force is zero
an object changes direction
an object moves at a constant acceleration
an object is not moving
8
How much force is needed to accelerate a 200 kg cow at 10 m/s²?
20 N
2,000 N
20,000 N
200 N
9
If there are no contact forces on an object and the apparent weight is 0, it is said to be...
small
at terminal velocity
in equilibrium
weightless
10
Consider this example. This is an example of ___
Newton's second law
Field force
Tension
Drag force
11
What is this called?
Free Body Diagram
Force Map
Free Gravity Map
Force Body Diagram
12
Which of the following sums up Newton's first law?
F=ma
internal forces
Equal and opposite
inertia
13
A mover pushes 40 kg of boxes with an acceleration of 2 m/s²... how much force?
20 N
120 N
40 N
80 N
14
Beginning at 10 m/s a car moves at 3 m/s² for 5 seconds. Find the final velocity of the car.
15 m/s
18 m/s
25 m/s
30 m/s
