A 1,140-kg car and a 12,600-kg truck approach each other from opposite directions. The truck is traveling at [01] km/hr. a. At what speed (m/s) would the car have the same momentum as the truck? b. The car and truck in (a) have a head-on collision and then stick together. What is their final common velocity (m/s)? (Assume the car is going in the positive direction.) c. What is the car’s change in momentum (kg m/s) in (b)? d. At what speed (m/s) would the same car have the same kinetic energy as the truck? e. The car and truck in (d) have a head-on collision and then stick together. What is their final common velocity (m/s)? (Assume the car is going in the positive direction.) f. What is the car’s change in momentum (kg m/s) in (e)?

A23 kg log of wood begins from rest, 300 m up a sluice (a water track used to transport logs, think of it as an inclined plane with negligible friction) inclined at 20° to the horizontal. after it reaches the flat waterway at the bottom it collides elastically with a 100 kg block of wood initially at rest near the base of the incline. (a) how long does it take the 23 kg log to travel down the incline? (b) what is the speed of the 23 kg log at the bottom of the incline? (c) what are the velocities of both blocks of wood after the collision? (d) what is the total kinetic energy before the collision? (e) what is the kinetic energy of the 23 kg log after the collision? (f) what is the kinetic energy of the 100 kg block of wood after the collision? (g) what is the total kinetic energy after the collision? (h) compare the total initial and total final kinetic energies. is this consistent with what you would expect for elastic collisions? explain!

Argon is adiabatically compressed from an initial volume of 16 liters to a final volume of 2 liters. by what factor do the following quantities change? do they increase or decrease? (a) the rms speed (b) the thermal energy of the gas (c) the molar specific heat cv (d) the pressure

Assume this car is driven off a cliff . how many arrows of force need to be drawn in the free body diagram? assume no air resistance -five -one -three -four