How much force is needed to stop a 80-kg football player if he decelerates at 5 m/s2

What is the final speed of a 60 kg boulder dropped from a 111 meter cliff

A blue puck has a velocity of 0i - 3j m/s and a mass of 4 kg. A gold puck has a velocity of 12i - 5j m/s and a mass of 6 kg. What is the kinetic energy of the system?

How many newtons of force are presented by the following amount:3 kg * m/sec squared? Select the correct answer a) 6 newtons b) 3 newtons c) 1 newton

A novice skier, starting from rest, slides down a frictionless 29.0∘ incline whose vertical height is 185 mm. How fast is she going when she reaches the bottom?

Which statement is true of the particles that make up a substance? A.) Particles in a solid have more energy than particles in a gas. B.) Particles in a gas have more energy than particles in a liquid. C.

Visualize five horizontal sedimentary strata exposed in a cliff or canyon wall identified by consecutive numbers, 1 being the lowest bed and 5 being the highest. Which of the following statements concerning the strata are true? a.

The characteristics that follow are characteristics of two of Galileo's surviving double-convex lenses. The numbers given are magnitudes only; you must supply the correct signs. L 1: front radius 950 mm, rear radius 2700 mm, refractive index 1.

Which car has the most kinetic energy? A car of mass 1500 kg with speed 5 m/s or A car of mass 1300 kg with speed 3 m/s or a car of mass 1200 kg with speed 2 m/s or a car mass 1400 kg with speed 4 m/s

A 500 kg table with 4 legs rests on solid flat ground. I place 3 books on the center of the table with masses of 10 kg, 20 kg and 30 kg respectively. What is the normal force between the ground and one leg of the table?

Fluorine-21 has a half-life of approximately 5 seconds. What percentage of the original nuclei would remain after 20 seconds