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A student m1 = 70 kg runs towards his skateboard, which has a mass m2 = 2.6 kg and is d = 2.8 m ahead of him. He begins at rest and accelerates at a constant rate of a = 0.9 m/s2. When he reaches the skateboard he jumps on it. What is the velocity of student and skateboard in meters per second?
The bullet passes right through and emerges on the other side with a speed of 100 m/s, and the saxophone is given a speed of 4.8 m/s.
If a cube of a certain metal increases its volume from 15 cm3 to 17 cm3 as the temperature increases from 12°C to 28°C
A jet with mass m = 1.3 × 105 kg jet accelerates down the runway for takeoff at 2.4 m/s2, What is the net horizontal force on the airplane
A small .500 kg object moves on a frictionless horizontal table in a circular path of radius 1 m. The angular speed is 6.28 rad/s. The object is attached to a string of negligible mass that passes through a small hole in the table at the center of..
A model rocket is fired vertically from rest. It has a net acceleration of 15.0 m/s2. After 1.1 s, its fuel is exhausted and its only acceleration is that due to gravity. how high does the rocket travel
An assistant standing on the level ground 150 m downrange from the launch point throws an apple straight up with the minimum initial speed necessary to meet the path of the arrow. Elucidate the initial speed of the apple?
The stairs are 83 long and inclined at the angle of 31. If a player has a mass of 87, estimate his average power output on the way up. Overlook friction and air resistance.
The magnetic field in a radio wave traveling through air has amplitude 2.5 10-11 T and frequency 2.9 MHz. Find the amplitude and frequency of the electric field
Two electrons are located at two of the vertices of an equilateral triangle, one at each vertex. What is the net electric field at the third vertex
A small rocket is powered upward on lift-off by an engine thrust of 12,000-N. If the resulting upward acceleration is 6.40m/s^2, what is the mass of the rocket?
A particle moves with constant acceleration a . The expression vi+at represents the particle's velocity at what instant in time? Here are the choices.
If you have 1.96 * 10^9 KWH and the value of energy is $0.10 per KWh, what is the value of electrical energy produced
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