First Law of Motion
Second Law of Motion
Third Law of Motion
F=ma triangle
Random Questions
100
Scenario:
A person has thrown a ball in a world with no gravity. What would happen to the ball?
a. The ball would stick to his hand
b. The ball would keep going forward unless something stopped it
c. The ball would deflate
d. A dog would eat it
b. The ball would keep going forward unless something stopped it
Fun Fact: Without gravity, we would have no atmosphere!
100
State Newtons 2nd law
F = ma
OR
The acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.
100
State newton's third law of motion
For every action there is an equal and opposite reaction.
100
An object with a mass of 6.0 kg accelerates 4.0 m/s2 when an unknown force is applied to it. What is the amount of the force?
24 N
(6.0 x 4.0 = 24.0)
100
You run into your friend while skating and both of you fall in opposite directions. This is an example of which law of motion?
Newton's Third law
200
What is the definition of inertia?
The tendency of an object to resist a change in it's motion
200
An object accelerates 2.0 m/s2 when a force of 12.0 newtons is applied to it. What is the mass of the object?
6 kg
(12.0 ÷ 2.0 = 6.0)
6 kg
(12.0 ÷ 2.0 = 6.0)
200
What makes a ball bounce off of the ground?
*Hint: This was in the slideshow
The ball bounces back up because the ball would become all deformed for a fraction of a second and then when the ball returns to its original shape, it releases that energy, making it bounce back up.
200
What does the Force Triangle look like?
200
An object that is not accelerating or decelerating has no forces acting on it.
False, an object at rest (which is not accelerating) has forces like gravity acting on it.
300
Why is there no friction in space?
There is no air resistance, gravity, or anything else to stop an object from moving.
300
What is net force?
The sum of all the forces acting on an object.
300
What makes the ball on the other end of Newton's cradle go up?
*Hint: This was on the slideshow*
When one sphere at the end is lifted and released, it bangs onto the stationary spheres, and then it transmits a force through the spheres which makes the ball go up on the other end.
300
Define 3 of the following:
- Acceleration
- Speed
- Weight
- Mass
Acceleration - the rate at which velocity changes
Speed - the distance traveled per unit of time.
Weight - the force exerted on a body/object by gravity.
Mass - the quantity of matter which an object contains; The amount of matter in an object
300
A person is pushing on a table with 20 N of force to the right. A person on the other side is pushing with 30 N to the left. What is the net force?
10 N to the left
400
The meaning of "at rest"
*don't overthink it too much; its literally what you think it is*
"not moving" :)
400
Name all three ways you can say F = ma
(for example you can say 6 ÷ 3 = 2 as
2 x 3 = 6
3 x 2 = 6
6 ÷ 2 = 3)
F = MA
M = F ÷ A
A = F ÷ M
400
What would be an equal and opposite reaction to you jumping onto a trampoline?
Jumping up again
400
An object accelerates 5.0 m/s2 when a force of 40.0 newtons is applied to it. What is the mass of the object
8 kg
(40.0 ÷ 5.0 = 8.0)
400
True or false:
Weight and Mass are the same thing
False
500
State Newton's first law of motion
Newton’s first law of motion states that an object in motion stays in motion and an object at rest stays at rest unless acted upon by an unbalanced force.
500
What is the equation for Newton's 2nd law?
Force = Mass x Acceleration
500
How is when you push from the wall of a swimming pool to push you off an example of Newton's third law?
When you push on the wall, the wall pushes you back with an equal but opposite force, pushing you through the water.
500
An object accelerates 12.0 m/s2 when a force of 6.0 newtons is applied to it. What is the mass of the object ?
1/2 kg
(6.0 ÷ 12.0 = 1/2)
500
True or false:
A less massive object has more inertia than a more massive object.
False