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Physics of Forces Newton's Laws Flashcards | StudBud
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Physics of Forces Newton's Laws
Physics of Forces Newton's Laws
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Physics problems involving forces, acceleration, and Newton's first two laws
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17 cards
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1
A 20 N force acts on a 10 kg sled, how fast will it be going in 3 seconds?
6 m/s
600 m/s
.667 m/s
1.5 m/s
2
What is the net force on the log?
400N
-400 N
0 N
200 N
3
All of the following are true about weight
EXCEPT
Weight is how much matter something contains
Weight is a force
Weight = mass x gravity
Weight is measured in Newtons
4
A unit for acceleration is...
m/s
km/hr
km
m/s2
5
F net would be...
-6 N
- 20 N
20 N
6 N
6
What does Newton's 1st Law state?
For every action, there is an equal and opposite reaction.
expressing the relation between force, mass and acceleration
An object that's in motion or at rest stay the same.
Force is dependent on mass
7
If a 20 kg dog is accelerates from 1 m/s to 3 m/s in 4 seconds, what is the force required?
80 N
10 N
40 N
160 N
8
What is a force?
The speed of an object in a particular direction
When an object's speed or direction do not change
distance traveled by an object
a push or pull
9
What is the acceleration on this 30 kg car?
35 m/s2
150 m/s2
.167 m/s2
6 m/s2
10
If your acceleration is constant and you double the mass...
the force required must stay the same
the force required must double
The force required will decrease by half
The force required cannot be determined
11
If the net force is zero, the object is either...
accelerating or deaccelerating
Decelerating or moving at a constant speed
Accelerating or not moving
Not moving or moving at a constant speed
12
What is the tendency of an object resisting to be stopped?
Air resistance
Force
Work
Inertia
13
If a box is moving at 4 m/s
2
with a force of 10 N, what is the mass of the box?
.4 kg
40 kg
14 kg
2.5 kg
14
What is the net force on the object...
11 N (to the right)
5 N (to the right)
-5 N (to the left)
-11 N (to the left)
15
If this car is accelerating, what must be true?
There are no forces present
There must be an unbalanced force in the direction of motion
F friction and F air resistance are bigger than F engine.
All forces must be balanced
16
Describe the motion based on the arrows
decelerate
no motion
constant speed
accelerate
17
A 15 N force acts on a 60 kg person sitting in a rolling chair. What is his speed after 10 sec?
.025 m/s
40 m/s
90 m/s
2.5 m/s
