Which of these is a correct expression for kinetic energy?
An object is moving at constant speed on a horizontal surfac…
An object is moving at constant speed on a horizontal surface. What is the net work done on it?
A 10 N force is applied perpendicular to a wrench 0.3 m long…
A 10 N force is applied perpendicular to a wrench 0.3 m long. What is the torque?
What does impulse equal?
What does impulse equal?
According to the law of conservation of momentum, which of t…
According to the law of conservation of momentum, which of these is true during a collision (if no external forces act)?
A 2 kg object swings in a vertical circle of radius 1.5 m. A…
A 2 kg object swings in a vertical circle of radius 1.5 m. At the lowest point, speed is 8 m/s.What is the tension in the string at the lowest point?
What is the mechanical energy of a system if potential energ…
What is the mechanical energy of a system if potential energy = 30 J and kinetic energy = 70 J?
If the net work done on an object is positive, what happens…
If the net work done on an object is positive, what happens to its kinetic energy?
Which of the following increases the torque produced by a fo…
Which of the following increases the torque produced by a force?
A 5 kg box is pushed 6 m across a rough floor by a 30 N forc…
A 5 kg box is pushed 6 m across a rough floor by a 30 N force applied at a 30° angle above horizontal. The coefficient of kinetic friction between the box and floor is 0.2.How much net work is done on the box?