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Above the surface of the Earth, the magnitude of the acceleration due to gravity is inversely proportional to the square of the distance from the Earth's center. For objects falling to Earth, a = k/r2, where k is a constant and r is the distance to the center of the Earth. (a) The radius of the Earth is about 6.40×103 km. Find k using the fact that a = g at Earth's surface. (b) Find the magnitude of the acceleration due to Earth's gravity at 1.00×102 km above the surface of the Earth.
what was the speed of the bullet at impact with block.
A basketball player makes a jump shot. The 0.600 kg ball is released at a height of 2.00 m above the floor with a speed of 7.20 m/s. The ball goes through the net 3.10 m above the floor at a speed of 4.20 m/s Find the work done on the ball by air ..
A 130 block on a frictionless table is firmly attached to one end of a spring with = 40. The other end of the spring is anchored to the wall. A 21 ball is thrown horizontally toward the block with a speed of 6.6.
A 38.00 kg girl is bouncing on a trampoline. All throughout a certain interval after she leaves the surface of trampoline, her kinetic energy decreases to 185J from 425J. How high does she rise all through this interval? Avoid air resistance.
A 190 g block hangs from a spring with spring constant 15 N/m. At t=0s, the block is 13 cm below the equilibrium point and moving upward with a speed of 98.0 cm/s.
A container of hot water at 50 degrees cools to 49 degrees in how many seconds when it is placed in a room that is t 20 degrees. use newton's law of cooling to find the time it will take for the container to cool from 50 degrees to 49 degrees.
The angular momentum of the electron as it moves around the center of the circle is 1.40 × 10-25J•s.Find the radius of the circular path.
A string passes over a frictionless pulley and connects a 250 g block to 2.00 kg block. The inclines are frictionless. Assuming you release both masses from rest, how much time would it take the 250g to travel 2200cm next to the ramp.
A 14 g bullet travelling at 247 m/s is fired into a 0.459 kg wooden block anchored to a 100 N/m spring. How far is a spring compressed to the nearest thousandth of meter.
What lengths of ship three sides according to the observer
A student makes a simple generator by using a single square loop 24 cm on each side. The loop is then rotated at a frequency of 60 Hz in a magnetic field of 0.044 T.
Study of the fragment
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