Physics Question a) If an object has a mass of 250. kgs and a velocity of 3.50 m/s what is the objects kinetic energy?

b) If the object described above started from rest, what work was done on the object to obtain that final kinetic energy?

c) What is the units for the final answers of the two previous questions.

Can someone explain to me how to do this problem ?

Calculate the work done by an external agent during an isothermal compression of 1.00 mol of oxygen from a volume of 22.4 l at 10∘c and 1.0 atm pressure to 16.8l

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?