6062

Physics Work,Power & Energy Level: Misc Level

The work function for metallic caesium is 2.14 eV. Calculate the kinetic energy and the speed of the 4+4=8 electrons ejected by light of wavength a) 750 nm, b)250 nm


6029

Physics Work,Power & Energy Level: Misc Level

A 60 g golf ball is dropped from a height of 2m and rebounds to 1.5 m. How much energy is lost?


6028

Physics Work,Power & Energy Level: Misc Level

A hill is 100 m long and makes an angle of 12 degrees with the horizontal. As a 50 kg jogger runs up the hill, how much work does gravity do on the jogger?


6027

Physics Work,Power & Energy Level: Misc Level

A 60 kg woman runs up a flight of stairs having a rise of 4 meters in a time of 4.2 seconds. What average power did she supply?


6026

Physics Work,Power & Energy Level: Misc Level

An Amount of work equal to 1 joule is required to compress the spring in a spring. To what height can this" gun shoot a 20- gram marble?


5994

Physics Work,Power & Energy Level: Misc Level

A 0.24-kg ball is dropped from a height of 3.5 m and bounces to a height of 1.8 m.Whatis its loss in potential energy?


5993

Physics Work,Power & Energy Level: Misc Level

Each step of a ladder increases one ,s vertical height 39 cm .If an 86.0-kg painter climbs 6 steps of the ladder, what is the increase in potential energy?


5992

Physics Work,Power & Energy Level: Misc Level

Compare the kinetic energies of a biker and a biker (with a combined mass of 73.0 kg) traveling at 2.52 m/s and the same biker and biker traveling twice as fast.


5791

Physics Work,Power & Energy Level: Misc Level

the potential energy, U is calculated using the formula U= mgh. if m=12 kg, g= 9.8 m/s 2 and h=6.50 m, the potential energy U with the correct significant figures is?


5578

Physics Work,Power & Energy Level: Misc Level

How much work is done by a 3300.0 kg mass of water falling a distance of 80.0 m down a water fall?


5568

Physics Work,Power & Energy Level: Misc Level

3 -A ball of mass 2 Kg is dropped from a height of 10 m. The speed of the ball is measured as 12.5 m/s just before it hits the ground. What was the work done against air friction during this fall?


5485

Physics Work,Power & Energy Level: Misc Level

A 70 kg athlete climbs a rope in the gymnasium at a constant speed of 0.700 m/s.what is the average power (in watts ) developed in the process?If the athlete climbs 5 meters, what is the amount of work done? How much time does climb the 5 meters?


5484

Physics Work,Power & Energy Level: Misc Level

A 20.0 gram ( better make it .0200 kg) bullet is fired horizontally at a slab of wood that is 3.00 cm (better make it 0.0300 m) thick. The bullet hed an initial velocity of 300 m/s. The bullet exits the other side of the wood with a velocity of 280 m/s. What is the change in kinetic energy of the bullet in this process? How much work is done on the bullet by the wood?what is the average acceleration of the bullet while traversing the slab of wood? what is the average force of thewood on the bullet?


5303

Physics Work,Power & Energy Level: Misc Level

A 70 kg cart is pushed for 50 m with a constant velocity upon a 45% frictionless incline. Find the work done on the cart. ( Assume g = 10 m/s2)


5301

Physics Work,Power & Energy Level: Misc Level

A 0.4 kg ball is thrown vertically upward with a speed of 30 m/s. The ball reaches a height of 40 m. Assuming g =10 m/s 2, the energy dissipated due to air friction is:


Displaying 1-15 of 537 results.