Physics

Question 1

What is the formula for the force of friction (Ff)?

Answer 1

Coefficient of friction*FN

Question 2

What is the formula for normal force (FN)?

Answer 2

mgcos(θ)

Question 3

What is the formula for normal force if there is an additional force acting at an angle?

Answer 3

mg - Fsin(θ) if it is at an upwards angle
mg + Fsin(θ) if it is at a downwards angle

Question 4

What is the equation for final velocity squared?

Answer 4

vf² = vi² + 2aΔx

Question 5

What are possible formulas for power?

Answer 5

P = W/t
P = Fvcos(θ)

Question 6

How are friction force and applied force related if the object has a constant velocity?

Answer 6

a = 0
ΣF = ma = 0 = Fa - Ff
Fa = Ff

Question 7

What is the work energy equation?

Answer 7

ΔE = W

Question 8

What is the formula for work?

Answer 8

W = Fdcosθ

Question 9

What is the unit of work?

Answer 9

1 joule = 1J = 1Nm
The unit of all forms of energy since work is simply energy being transferred

Question 10

What is the formula for kinetic energy?

Answer 10

K = ½mv²

Question 11

What is the formula for gravitational potential energy?

Answer 11

Ug = mgy

Question 12

What is the formula for elastic potential energy?

Answer 12

Us = ½kx²

Question 13

What are possible formulas for centripetal force?

Answer 13

FC = mv²/r
FC = FN + Fg

Question 14

How are centripetal force and gravitational force related?

Answer 14

mv²/r = mg