A bumper car with a mass of 86 kg is traveling at 3.6 m/s. A bumper car with a mass of 98 kg is traveling at 1.6 m/s in the opposite direction. After the collision, the 86 kg bumper car travels at -0.5 m/s. What is the speed of the 98 kg bumper car after the collision?

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?