1. a racing car with the driver weighs 1825 lb. find the kinetic energy in ft*lb when traveling with a speed of 100 mi/hr.
3. a mass of 5 kg initially at rest is given a speed of 14 m/s. what is its kinetic energy?
me

Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass of the object?

The desk has a weight of 75 lb and a center of gravity at g. determine the initial acceleration of a desk when the man applies enough force f to overcome the static friction at a and b. also, find the vertical reactions on each of the two legs at a and at b. the coefficients of static and kinetic friction at a and b are ms = 0.5 and mk = 0.2, respectively

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.