HELP THIS IS DUE IN 5 MINUTES WILL GIVE BRAINLIEST what is the definition of total velocity?

If the wheels lock when braking suddenly the vehicle: a: loses traction b: lose steering wheel ability c: gain speed slightly d: gain steering ability

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?