Sally is to walk across a “high wire” that has been strung horizontally between two buildings that are apart. The sag (dip) in the rope when she stands at the midpoint is . If her mass is , what is the tension in the rope at this point?

A woman stands on the edge of a cliff and drops two rocks, one of mass and one of , from the same height. Which one experiences the greater acceleration?

What is the acceleration of two falling skydivers (total mass = including parachute) when the upward force of air resistance is equal to one fourth of their weight?

A person stands on a scale in an elevator. His apparent weight will be the greatest when the elevator

Jerry wants to lift a ball with exactly enough force so that its upward velocity is constant. How much force should he use? Assume

If the mass of the object is and , what is the value of ? Assume

The acceleration of gravity on the moon is significantly less than the acceleration of gravity on earth. What will happen to an astronaut's weight and mass on the moon, compared to her weight and mass on Earth?

A weight and a weight are dropped simultaneously from the same height. Ignore air resistance. Compare their accelerations.

Michael lands on a new planet. If his mass is and the acceleration due to gravity on this planet is , what would his weight be?

A ball falls off a cliff. What is the force of gravity on the ball? Assume