A student stands at the top of a building of height 50 m. He throws two identical balls with a speed of 20m/s, one up, the other down. If air resistance is included which ball strikes the ground with higher speed? A. The ball thrown upward B. The ball thrown downward C. Both balls will have the Same speed

There are 2 cars. Assuming the first car has a mass of 1000 Kg, which has greater kinetic energy? a. The first car traveling at 30 m/s b. a second car of half the mass traveling at 60 m/s. c. both have the same kinetic energy d. need more information

3. An urban myth states that a penny dropped from the top of the Empire State Building (1440 ft tall) in NYC could be lethal. Ignore air friction and find the final velocity of the penny.

An object travels at a speed of 4.0 m/s. It has 24 J of kinetic energy. What is the kinetic energy of the object if the speed is 2.0 m/s?a) 6J    b) 12J   c) 24J    d) 48J    e) 96J

An object is initially held at rest from a height of 4 m. The object is then released. A. Use conservation of energy to find the velocity right before it hits the ground B. Use the position equation to find the time it takes to reach the ground.

On the roller-coaster shown, a car is moving 10 m/s toward the right at point 1. Assuming no friction, calculate the speed of the car at point 4. 3 40 m 26 m 15 m 29.37 m/s 22.71 m/s 20.89 m/s 26.17 m/s A. D. В. 25.07 m/s Е. С. 24.29 m/s F.

A force of F=x^2 in Newtons acts on an object of mass m= 2 kg. If the object is at rest at x= 0 when the force F begins to act on it, what is the object’s speed at the position x= 3 m? A) 3 m/s B) 6 m/s C) 9 m/s D) 27 m/s

A kid on a bike with a combined mass of 100 kg goes 7 m/s at the top of a hill. The hill has a vertical drop of 50 m. How fast is the kid and bike going when they reach the bottom of the hill?( no friction) 1. c. d. O 27 m/s 23 m/s O 32 m/s O 980 m/s

A 0.12 kg egg is dropped from a height of 2m and falls into an egg catcher.a. How fast is the egg traveling when it falls into the catcher from the height of 2m?b. If the catcher takes 0.2 seconds to bring the egg to a stop, what average force acts on the egg during the catch?

E. 19.77 m/s 21.85 m/s C. 26.37 m/s F. 1--1 IYYVE On the roller-coaster shown, a car is moving 12 m/s toward the right at point 1. Assuming no friction, calculate the speed of the car at point 4. 3 40 m 26 m 4 15 m 21. A. 20.28 m/s D. 25.18 m/s 24.54 m/s B. 18.94 m/s E. F. C. 23.73 m/s 26.35 m/s 1--1 KTMDG A box slides from rest down a curved slope. Its initial height is 21 m above the ground, and it comes off the slope 7_m above the ground. How fast is the box moving as it leaves the slope? Assume friction is negligible. ^ Pigshow.jpeg Pig show.jpeg