kinetic energy

20. A 0.324kg air track glider moves linearly with an initial speed of 1.37m/s. In order to increase the speed of the mass, 7.31J of work are done. What is the final speed of the glider? please show all work with answers. think physics for dummies when explaining

Conservation of Mechanical Energy

40. A black of mass m=750g is released from rest and slides down a frictionless track of height h=55.2cm. At the bottom of the track the block slides freely along a horizontal table until it hits a spring attached to a heavy, immovable wall. The spring compressed by 2.64cm at the maximum compression. What is the value of the sp ...continues

Impulse

20. A person about to jump from a 1.60m high platform wants to limit the average stopping force on lading to 12 times her weight. By how much will it be necessary to lower herself by flexing her knees? Give an algebraic rather than numerical answer. Compare that work with the original potential energy she had before she jumped ...continues

Conservation of Momentum in one dimensional Collisions

40. A 7.45g bullet from a 9mm pistol has a velocity of 353m/s. It strikes the 0.725kg block of a ballistic pendulum and passes completely through the block. If the block rises through a distance h=12.1cm, what was the velocity of the bullet as it emerged from the block? please show all work along with the correct answer and t ...continues

Elastic Collisions in ONe-Dimension

20. A 237g air track glider moving at 0.80m/s on a 2.4 long air track collides elastically with a 513g glider at rest in the middle of the track. The end of the track over which the struck glider moves is not level, but slants upward at an angle of 0.70 degrees with respect to the horizontal. Will the glider reach the end of th ...continues

Motion in Gravitational Potential

40. A rocket is projected upward from the earth's surface(r=Re)with an initial speed of Vo that carries it to a distance r=1.5Re from the center of the earth. What is the launch speed Vo? Assume that air friction can be ignored and give your answer in terms of g and Re. please show all work with correct answers and provide i ...continues

Static Equillibrium

20. A trucker needs to weigh a truck that is too long to fit on a platform scale. When the front wheels of the truck are run onto the scale, the scale reads W1. When the rear wheels are run onto the scale so that the front wheels are off, it reads w2. a) Prove that the total weight of the truck is W1+W2. b) Prove that if the tr ...continues

Angular Momentum and COnservation of Angular Momentum

40. A uniform 2.45kg spinning disk with a radius of 0.243m is brought to rest by a brake pad pressed against the side 0.183m from the rotation axis. The wheels is brought to rest from an angular velocity of 15.4rad/s in a time of 24.3s. What frictional force was applied by the brake pad.

Planck's function

Using planck's energy density per unit frequency formula. r(x)= x^3 / e^x -1. Plot r(x) from excel spread sheet and determine its maximum. I need help in using excel to graph this inorder to find the maximum. Then based on the maximum I am supposed to determin planck's constant

basket cushioning for dropping an egg

using only gum drops and toothpicks, what is the best structure to build to protect an egg when you drop the egg inside this structure? ( basket cushioning effect)