What are two types of mechanical energy? a. electrical and kinetic b. nuclear and chemical c. radiant and thermal d. elastic and gravitational

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

What efficiency of a car's engine when heat input is 200,000 joules and waste heat is 150,000 joules? a. 75% b. 35% c. 25% d. 85%

Part of a control linkage for an airplane consists of a rigid member cb and a flexible cable ab. if a force is applied to the end b of the member and causes it to rotate by θ = 0.5°, determine the normal strain in the cable. originally the cable is unstretched.