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. 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 energy = 30 J and kinetic energy = 70 J?

 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 force?

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?

A force of 20 N acts at an angle of 60° to the direction of displacement. If the object is displaced 3 m, what is the work done by the force?

A disk has a moment of inertia of 2 kg·m² and is spinning at 5 rad/s. What is its angular momentum?

Which of the following ways of increasing self-efficacy is generally used by motivational speakers?

The ________ theory is also known as the social cognitive theory or the social learning theory.