A car moving at 27 m/s [fwd] strikes the back end of a stationary disabled rock truck bringing the car to rest in a time of 0.7 seconds. If the 65 Kg person inside the vehicle was wearing a seatbelt, then calculate the force that the belt would exert on the person.

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Agas is contained in a vertical, frictionless piston–cylinder device. the piston has a mass of 3.2 kg and a cross-sectional area of 35 cm2. a compressed spring above the piston exerts a force of 190 n on the piston. if the atmospheric pressure is 95 kpa, determine the pressure inside the cylinder.

Suppose you have a box. which of these is not necessarily a true statement regarding the relationship between the force applied to the box, the work done on the box, and the distance the box is moved? a. if the box is not moved, no force is being applied to the box. b. if no force is applied to the box, no work is done on the box. c. if work is done on the box, then a force is applied to the box. d. if work is done on the box, then the box is moved a distance.