Ahorizontal force of 200n is applied to a 55kg cart across a 10m level surface. if the cart accelerates at 2.0m/s^2, then what is the work done by the force of friction as it slows the motion of the cart?

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.

Amother used 150 watts of power to raise a 15 newton object in a time interval of 8.0 seconds. through what vertical distance was the object raised ?

What is offspring? why does a longer life span mean a higher chance of producing offspring?