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A 4.00-kg block of ice is placed against a horizontal springthat has a force constant k=200 N/m and is compressed 0.025m. The spring is released and accelerates the block along a horizontalsurface. You can ignore friction and the mass of thespring.
a) Calculate the work done on the block by the spring during the motion of the block from its initial position to where thespring has returned to its uncompressed length.
b) What is the speed of the block after it leaves thespring?
An old hunting weapon was a rock on the end of a string. The hunter would swing the rock in horzontal circles and then throw it. If the rock had a mass of 2 kg and the 2 m long string breaks when the tension is 60N.
a 100 MeV particle decays into two particles. one of these two particles has a mass of 10 MeV and a speed of 3/5. a) what are the mass and speed (in the initial particle rest frame) of the second particle
A child places a picnic basket on the outer rim of a merry-go-round that has a radius of 4.2 m and revolves once every 33 s. What is the speed of a point on that rim
A rear-wheel-drive car supports 44% of its weight on its two drive wheels and has a coefficient of static friction of 0.80. What is the vehicle's maximum acceleration
A rod of 2.0-m length and a square (2.0 mm × 2.0 mm) cross section is made of a material with a resistivity of 6.0 × 10-8 ? ? m. at what rate is heat generated in the rod
A mass m1 = 5.3 kg rests on a frictionless table and connected by a massless string to another mass m2 = 5.3 kg. What is the final speed of the two blocks
A dockworker applies a constant horizontal force of 84.0\({\rm N}\) to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 12.5\({\rm m}\) in a time 4.80\({\rm s}\)
A jetliner can fly 5.32 hours on a full load of fuel. Without any wind it flies at the speed of 220 m/s. The plane is to make a round-trip by heading due west for a certain distance, turning around, and then heading due east for the return trip.
An electron initially at rest is accelerated between two parallel plate 2.000 cm apart, What kinetic energy does the electron have when it hits the positive plate
A harvest mouse can detect sounds as quiet as -10 . Suppose you are sitting in a field on a very quiet day while a harvest mouse sits nearby at the entrance to its nest. How far is the harvest mouse from the leaf
A cannonball is shot (from ground level) with an initial horizontal velocity of 40 m/s and an initial vertical velocity of 21 m/s, What is the initial angle of the cannonball with respect to the ground
A 41 kg crate, starting from rest, is pulled across a floor with the constant horizontal force of 250 N. For the first 10m the floor is frictionless, and for the next 11.00 m the coefficient of friction is 0.17. What is the final speed of the crat..
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