1. Free Fall, Forces, and Newton
ICP
Free Fall, Forces, and Newton

2. 4 Known Universal Forces
Electromagnetism
Gravity
Strong Nuclear Force
Weak Nuclear Force
4 Known Universal Forces

3. 4 Types of Friction:
Static
Sliding
Rolling
Fluid
Friction

4. Objects with different masses fall at ________________ _______ rates.
Free Fall

5. Terminal Velocity

6. A box sliding along a counter
Free Body Diagrams

7. Newton’s 1st Law of Motion
Objects in motion/rest will stay in motion/rest until acted upon by an outside force

8. How does this explain the necessity for seatbelts?
Newton’s 1st Law

9. Newton’s 2nd Law F = ma W = mg F = net force (N) (N) = (kg)(m/s2)
m = mass (kg)
a = acceleration (m/s2)
Newton’s 2nd Law

10. A boy pushes forward a cart of groceries with a total mass of 40. 0kg
A boy pushes forward a cart of groceries with a total mass of 40.0kg. What is the acceleration of the cart if the net force is 60.0N forward?
Newton’s 2nd Law

11. An automobile with a mass of 1200kg accelerates at a rate of 3
An automobile with a mass of 1200kg accelerates at a rate of 3.0m/s2 in the forward direction. What is the net force acting upon this car in the absence of friction?
Newton’s 2nd Law

12. An astronaut with a mass of 95kg is standing on Earth
An astronaut with a mass of 95kg is standing on Earth. What is his weight?
Newton’s 2nd Law

13. An astronaut with a mass of 95kg is standing on Mars
An astronaut with a mass of 95kg is standing on Mars. Acceleration due to gravity on Mars is 3.7m/s2.
A.) What is the astronaut’s weight on Mars?
B.) What is the astronaut’s mass on Mars?
Newton’s 2nd Law