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A fighter jet of mass 9600 kg is moving at a speed of 72 m/s. If its total energy is 2.60×108 J, how high from the ground is it?

A delivery truck is carrying a 120-kg refrigerator. The refrigerator is 2.20 m tall and 85.0 cm wide. The refrigerator is facing sideways and is prevented from sliding. What is the maximum acceleration that the truck can have before the refrigerator begins to tip over? Assume that the center of gravity of the refrigerator is located at its geometrical center.

Impulse is ___________.

If no forces are acting on a moving object, the object will continue to move with constant:

Which of the following is true about momentum? I. It is a vector. II. It is a product of mass times velocity. III. Impulses are required to change it.  

A crate of a weight of 100 N is held in place on a smooth ramp by a rope parallel to the slope attached to a stake at the top of the ramp. What is the tension in the rope if the angle of inclination of the ramp is 20o?

You and your friend push against a wall. Your friend stops after 10 min, while you push for 5 min longer. Compare the work you and your friend do.

A pendulum is pulled to a height of 1.28 m above the lowest position and released. What is its speed at the level of the lowest position?

A ball hits a wall head on and sticks to it. If instead the ball bounces off the wall with one-half of the original velocity and the collision lasts the same time, the average force on the ball would be _____ times greater.

A pole vaulter clears 6.00 m. What is his velocity just before landing?