1st Law
2nd Law
3rd Law
Machines
Graphs
100
What is Newton's First Law?
The Law of Inertia: an object at rest tends to stay rest and an object in motion tends to stay in motion and unless an unbalanced force acts on them.
100
What is the relationship between mass, acceleration and force?
If mass increases, so does force.
Is acceleration increases, so does force.
Force is equal to mass times acceleration.
100
What is the force of gravity? Hint: I want a number and a unit.
9.8 m/s^2
100
List the 6 simple machines.
Lever
Inclined Plane
Wedge
Pulley
Wheel & Axel
Screw
100
Describe the direction and speed of the object.
The object is accelerating and moving forward.
200
What is the magnitude of the force on a 59.6 kg object if it accelerates at 68.2 m/s^2? Round to the nearest tenth.
(59.6kg)(68.2 m/s^2) = 4064.72N
200
A bug with a mass of 5 grams flies into a windshield of a moving 1000kg bus. Which will have the most force?
A: the bug on the bus
B: the bus on the bug
B: the bus on the bug
200
Why do chefs sharpen their knives?
It makes the wedge more distinct which makes a thinner wedge easier to do work.
200
Describe the motion at 0-2s, 2-4s, and 4-6s.
0-2s: accelerating forward
2-4s: at rest
4-6s: decelerating forward
300
If a 0.576 kg object has a force of 29.4 N applied to it, what would be its rate of acceleration? Round to the nearest tenth.
(29.4N)/(.576kg) = 51.04m/s^2
300
What is a pulley and why does it make work easier?
A pulley is a rope pulled over a wheel or a system of wheels. It changes the direction of the force which increases the applied force making work easier.
300
When does the object reverse directions?
At 4 seconds.
400
What is the mass of an object that accelerates at 1.3
m/s^2
when a 352 N is applied to it? Use mass in kg. Round to the nearest tenth.
(352N)/(1.3 m/s^2) = 270.77kg
400
Explain where the fulcrum is placed for all types of levers. Provide an example for each type of lever.
1st: the fulcrum is placed between the effort and the load - a seesaw
2nd: the load is between the effort and the fulcrum - wheelbarrow
3rd: effort is between the load and the fulcrum - a baseball bat
400
Describe the direction of the object. Is it speeding up or slowing down?
The object is moving forward and speeding up.