A man pushes down on a lever with 45 N and the lever moves 1.5 meters. The other end of the lever lifts a 87.6 N box. 4 meters. What is the efficiency of the lever?

A motorcycle is traveling at a velocity of 5.0 m/s when a car swerves into its path. The driver breaks and it takes 3.0 seconds and a distance of 24 meters before the motorcycle comes to a complete stop. The mass of the motorcycle is 170 kg.

How much physical activity do children and trens need? A. 50 minutes at least twice a week B. 50 minutes at least five days a week C. 150 minutes a week D 150 minutes at least five days a week

Height must be measured in units of?

A current in a wire increases from 2 A to 6 A. How will the magnetic field 0.01 m from the wire change? A) It increases to four times its original value. B) It increases to three times its original value.

A car traveling at 54 mph decelerates at 29 feet per second per second. how long does it take for the car to come to a complete stop

Which best explains the relationship between the speed of sound and the medium through which it passes?

g The magnetic force on a charged particle A. depends on the sign of the charge on the particle. B. depends on the velocity of the particle. C. depends on the magnetic field at the particle's instantaneous position. D.

How fast must a 1000 kg car be moving to have a kinetic energy of 1.0 kWh

Which of the following is used to measure weight? Newtons Liters Kilograms Meters

Intravenous infusions are often made under gravity. At what height should the bottle be placed so the liquid pressure is 700 mm-H2O?