Derive an equation of motion s=ut+1/2at2 for an object moving in straight line​

What is the conversion factor between kg/m^3 and g/m^3. express your experimental values for the densities in kg/m^3.

Ahockey player of mass 82 kg is traveling north with a velocity of 4.1 meters per second he collides with the 76 kg player traveling east at 3.4 meters per second if the two players locked together momentarily in what direction will they be going immediately after the collision how fast will they be moving

Acar jack with a mechanical advantage of 6 needs to produce an output force of 600 n to raise a car. what input force is required? 6 n 100 n 600 n 3,600 n