If the net force is zero, the object is either...

Not moving or moving at a constant speed

All of the following are true about weight EXCEPT

Weight is how much matter something contains

What does Newton's 1st Law state?

An object that's in motion or at rest stay the same.

If this car is accelerating, what must be true?

There must be an unbalanced force in the direction of motion

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Duplicate of 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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Questions 17

Answers

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

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