A block is released from rest at the top of a 47-m long frictionless ramp inclined at 34° above the horizontal. What is the block's speed at the bottom of the ramp? V= m/s

5.6 N/m3. The particle's speed at A, where xA A particle of mass 3.4 kg is constrained to move along the x-axis under a single force F(x) = -cx', where c = m/s) at B, where xB 1.0 m, is 6.3 m/s. What is its speed (in = -2.0 m? m/s

Fleas have remarkable jumping ability. A 0.55 mg flea, jumping straight up, would reach a height of 30 cm if there were no air resistance. In reality, air resistance limits the height to 20 cm .   What is the flea's kinetic energy as it leaves the ground? Express your answer with the appropriate units. K=?   At its highest point, what fraction of the initial kinetic energy has been converted to potential energy? f=?

During a rockslide, a 390 kg rock slides from rest down a hillside that is 460 m long and 300 m high. The coefficient of kinetic friction between the rock and the hill surface is 0.24. If the gravitational potential energy U of the rock-Earth system is set to zero at the bottom of the hill, what is the value of U just before the slide?1.15×106 J How much mechanical energy is dissipated by frictional forces during the slide? What is its speed then? What is the kinetic energy of the rock as it reaches the bottom of the hill?

Which of the following pairs of particles will have NO ELECTROSTATIC INTERACTION? Choose all that apply. 02 electrons 2 negative ions A neutrino & a negative ion A proton & a neutrino A negative ion & a -1000 μC charge DA +839 μC charge & a -272 μC charge DA proton & a positive ion A-774 μC charge & a -240 μC charge

Please don't provide handwritten solution.....

The work required by Neymar to push a box of soccer balls on a horizontal, frictionless floor to accelerate it from a speed of zero to v is W1. The work required by Neymar to accelerate the box of soccer balls on the same floor, from v to 2v is W2. The ratio of W2 to W1 is   The correct answer is 3 but I don't know how they got to that answer

On board the starship Serenity, Captain Mal has two boxes connected together by a cord that passes over a massless, frictionless pulley mounted on the ceiling of the storage bay. The first box has a mass of 252.0kg and the second box has a mass of 278.0kg. If the 278.0kg box starts off at rest 2.60m above the ground, find the speed of the box when it reaches the ground. Assume the gravity on Serenity is 9.80m/s2.

A daredevil on a motorcycle leaves the end of a ramp with a speed of 39.2 m/s as in the figure below. If his speed is 36.8 m/s when he reaches the peak of the path, what is the maximum height that he reaches? Ignore friction and air resistance.   __________ m

A 9.0-kg bunny slides from rest down a frictionless incline from a height of 5.0 m. A constant frictional force, introduced at point A, brings the bunny to rest at point B, 19 m to the right of point A. What is the Speed of the bunny before it reaches point A? What is the coefficient of kinetic friction, µk, of the surface from A to B?