Car is travelling north at a constant speed of 20 m/s. a force is applied directly east on the car. the motion of the car will be change in which of these ways? a) the speed of the car will increase. b) the speed of the car will decrease. c) the speed will increase, and the car will change the direction it is moving. d) the speed will remain the same, but the car will change the direction it is moving.

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?