A ball which is thrown vertically upwards at 1.2 m s- decelerates uniformly at 10 m s-2. How long will it take
to reach zero velocity?
A 0.12 s
B 2.4 s
C 6.0 s
D 12.0 S

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

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

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?