Object Mass
(kg)
Location
Grav. Field
Strength
(N/kg)
9.8
Weight
(N)
Astronaut
72
Earth
706.08
Astronaut
72
Earth Orbit
9.5
Melon
9.2
Earth
9.8
90.22
Melon
Moon
1.7
Hammer
4.8
Moon
7.68
7.8384
Hammer
Mars
3.8
Astronaut
72
Mars
27.24

Ball b is hanging from an inextensible cord. an identical ball a is released from rest when it is just touching the cord and drops through the vertical distance h a 5 8 in. before striking ball b. assuming e 5 0.9 and no friction, determine the resulting maximum vertical displacement h b of the ball b

20. threshold braking in the vehicle's braking system occurs when a. the brake pedal is pushed, heel on floorboard, with full foot pressure. b. the brakes are exerting full braking power, without traction loss. c. the driver begins pushing down the brake pedal, with moderate slowdown. d. the brakes just begin to take hold with a gradual slowdown.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final