A 68-gram superball is projected horizontally from a height of 2.3 m above a smooth table. The ball bounces off he table to a height of 1.1 m above the table. What is the kinetic energy lost due to the collision with the table? ______ J

An astronaut lands on a newly-discovered planet (without an atmosphere). As an experiment, she throws vertically upwards a pure vanadium sphere of radius 2.0 cm and density 5.5 × 103 kg m3 with an initial speed of 3.0 ms 1. The point of release is 1.2 m above the ground. She observes the sphere to travel 4.8 m before it starts falling to the ground. Calculate the kinetic energy of the projectile just as it hits the ground.

Based on the kinetic energy of each object, which of the scenarios likely describes an object possessing 1 J of kinetic energy? a) a tiger running after prey b) an elephant running across a field c) a mosquito flying through a swamp d) a beetle walking across a jungle floor e) a cat walking down a sidewalk

A ball of mass 500 g swings on the end of a 70 cm long string and collides with a 2.5 kg block as shown. Assume that the collision is perfectly elastic. a) What is the speed of the block immediately after the collision? b) How high does the ball rise after the collision?

The spring in the muzzle of a child's spring gun has a spring constant of 705 N/m. To shoot a ball from the gun, first the spring is compressed and then the ball is placed on it. The gun's trigger then releases the spring, which pushes the ball through the muzzle. The ball leaves the spring just as it leaves the outer end of the muzzle. When the gun is inclined upward by 30° to the horizontal, a 57 g ball is shot to a maximum height of 1.84 m above the gun's muzzle. Assume air drag on the ball is negligible. (a) At what speed does the spring launch the ball? m/s (b) Assuming that friction on the ball within the gun can be neglected, find the initial compression distance of the spring. m

Two blocks with masses 0.342 kg (A) and 0.719 kg (B) sit on a frictionless surface. Between them is a spring with spring constant 27.7 N/m, which is not attached to either block The two blocks are pushed together, compressing the spring by 0.270 meter, after which the system is released from rest. What is the final speed of the block A? (Hint: you will need to use both conservation of energy and conservation of momentum to solve this problem).

A 1.1 g ball is shot horizontally out of a spring gun from a height of 0.9 m and lands 2 m horizontally away from the gun. What is the spring constant in N/m of the spring which launched the ball if the ball compressed the spring 0.4 m?

Based on your measurements of vertical position vs time you should have noticed that the maximum height of the ball decreases with each subsequent bounce. A basic analysis of kinetic energy and gravitational potential energy conservation would imply that each bounce should result in the ball returning to the same height from which it was initially dropped. Explain why the height of each subsequence bounce decreases, and why this does not violate the overall conservation of energy.

Let Á = 2.0 m/s i – 9.0 m/s j+5.0 m/s k and let B = 2.0 kg kg j+ 2.0 kg k ,what is A· B?