Calculate the kinetic energy of the earth

Reference no: EM13554034

1. A car moving at 15 m/s skids to a stop in 20 m. If the cartravels at 45m/s , how far will skid, assuming the same constantbraking force?

2. The Navy wants a new airplane launcher for their aircraftcarriers and you are on the design team. The launcher iseffectively a large spring that pushes the plane for the first 5meters of the 20 meter long runway. During that same time, theplane's jet engines supply a constant thrust of 5.4x10^4 N for theentire length of the runway. The 2000 kg planes need to have avelocity of 45'm/s by the end of the runway. What shouldbe the spring constant for the launcher?

3. Calculate the kinetic energy of the earth as it makes onrevolution around the sun.

4. Hulky and Bulky, two UPS workers, decide to race each other upa flight of stairs (h=4.0m) at the warehouse. Hulky, whose mass is120 kg, makes the climb in 3.0 s; while Bulky, 150 kg, took 4.0 Sto make the climb.
a) who has more Eg ( gravity ) at the top?
b) who exerted more power getting there?

Reference no: EM13554034

Questions Cloud

Kinetic coefficient of friction is larger than static : To push a piece of heavy furniture across the carpet usually takesmore force to get it moving than it takes to keep it moving, this is because:

Kinetic friction of metal object sliding along anothermetal : The kinetic friction of one metal object sliding along anothermetal surface depends lease upon:

Calculate maximum hight-ball thrown with initial velocity : A ball thrown with an initial velocity of 12 m/s at 30 degreesabove the horizantal from a rooftop 40 m high. Calculate: the maximum hight. the horizantal distance coverd when it is 40 m below the roof

Calculate temperature coefficient of linear expansion : The length of a steel bar increases by 0.039 % when itstemperature is increased from 0o C to 35o C. Calculate the temperature coefficient of linear expansion for thisbar. (Round the answer to three significant figures.)

Calculate the kinetic energy of the earth : A car moving at 15 m/s skids to a stop in 20 m. If the cartravels at 45m/s , how far will skid, assuming the same constantbraking force? Calculate the kinetic energy of the earth as it makes onrevolution around the sun.

A bike rider approaches a hill at aspeed : A bike rider approaches a hill at aspeed of 8.5 m/s. The combined mass of the bike and the rider is85.0Kg. choose a suitable system. find the initial kinetic energyof the system. the rider coasts up the hill. assuming there is nofriction, at what ..

Scientists working in field of nanotechnology : Scientists working in field of nanotechnology use either atop-down or bottom-up approach to construct tiny objects. Give andexampleof a visible structure that was made using the bottom-upapproach and one that was made using top-down approach.

What form of energy did the bike gain mechanial energy : Suppose that the bike rider in problem 15 pedaled up the hilland never came to a stop. in what system is energy conserved? from what form of energy did the bike gain mechanial energy?

Change in the orbiting space crafts velocity its altitude : De-orbit maneuvers are done to lower the perigee of the orbit to 60miles (or less). Calculate the minimum change in velocity (delta V)required for the Space Shuttle to decrease its altitude to 60 milesif its orbiting with an apogee of 236 miles an..

User Account

All Pages