What's the Force?
This force acts on every object and always acts directly down from the center of mass of an object.
Force Gravity
What is formula for Force?
F = ma
0 N
This force acts in the direction of motion
Force push/pull
What is the formula for Force Gravity?
F = mg g=9.81m/s2
A scale on an elevator reads 750 N. At some point the scale reads 800 N. What is the motion of the elevator?
Upwards
This force acts in the opposite direction of motion
Force Friction
What is the formula for Force on an elevator?
F = m (a+g)
A scale reads 750 N on an elevator. At some point the scale reads 550 N. What is the direction of the elevator?
Downwards
When on a rollercoaster loop de loop, at the very top of the loop. What two forces act on you?
Force Normal and Force Gravity
Using the formula for force on an elevator, give me how the formula to solve for acceleration of an elevator
a = (FN / m ) - g
An elevator accelerates at 5 m/s2 and a man stands on a scale that reads 250 N. What is the mass of the man?
50 kg
F= ma m = F / a m= 250/5
This force always acts directly perpendicular to a surface
Force Normal
Using the formula for Force Normal, if you are given mass and force, which formula will you use for finding acceleration?
a = F / m
A 50kg man gets in an elevator and feels a force of 300 N acting on him. What is the acceleration of the elevator?
6 m/s2
F = ma a = F/m a= 300/50 = 6