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Communications and weather satellites always appear at the same place in the sky because these satellites are

With no air resistance, a projectile fired at 50° has the same range as if it were fired at

A 1000-kg truck moving at 10 m/s that brakes to a stop in 5 s has an average braking force of

Lillian pulls on a 10-kg wagon with a constant force of 30 N. What is the wagon’s acceleration?

A block of Styrofoam floats on water while a same-size lead block lies submerged in the water. The buoyant force is greatest on the

An iron ball is placed in a pie pan that floats in a bucket. The water level is marked at the side of the bucket. Then the iron ball is removed and allowed to sink in the bucket. The water line at the side of the bucket is

If an object falls with constant acceleration, the velocity of the object must

A 5-kg fish swimming at 1 m/s swallows an absent-minded 1-kg fish swimming toward it at 4 m/s. The speed of the larger fish after lunch is

An egg is placed at the bottom of a bowl filled with water. Salt is slowly added to the water until the egg rises and floats. From this experiment, we conclude that

A boxer punches a sheet of paper in midair from rest to a speed of 40 m/s in 0.05 s. If the mass of the paper is 0.01 kg, the force of the punch on the paper is