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A sled slides without friction down a small, ice covered hill. If the sled starts from rest at the top of the hill, its speed at the bottom are 7.50 m/s. A) On the second run the sled starts with a speed of 1.50m/s at the top. When it reaches the bottom of the hill is its speed 9.00 m/s, more than 9.00m/s, or less than 9.00m/s. Explain. B) Discover the speed of the sled at the bottom of the hill after the second run.
q.what is the magnitude of the apparent weight of a 84 kg astronaut 4800 km from the center of the earths moon in a
An 18.00 g rifle bullet travelling 250 m/s buries itself in a 3.6 kg pendulum hanging on a 2.8 m long string, which makes the pendulum swing upward in an arc. Determine the horizontal component of the pendulum's displacement.
a series rlc circuit has a source of time-varying emf providing 15 v at a frequency f0 with l 7.90 mh r 130 omega and
A man whose weight = 584N is doing pushups. His center of gravity is located 0.410m from where his hands tough the ground, Find the normal fource exerted by the floor on EACH hand
a brass cylindrical bar at 300 k has a diameter of exactly 34 mm. an aluminum ring has an inner diameter which is
Vital Signs of Planet Earth
The pressure of a gas is kept constant while 3 m3 of the gas at an initial temperature of 50oC is expanded to 9 m3. What is the final temperature of the gas
A proton moving at 3.50 106 m/s through a magnetic field of magnitude 1.66 T experiences a magnetic force of magnitude 8.40 10-13 N
In this experiment, you bend your elbow and stack coins on top of your arm, Which coins are the easiest to catch
Two light sources are used in a photoelectric experiment to determine the work function for a particular metal surface. what is the work function for this metal
A spherical drop of water carrying a charge of 11 pC has a potential of 590 V at its surface (with V = 0 at infinity). What is the radius of the drop
A father (m = 90 kg) and son (m = 45 kg) are standing facing each other on a frozen pond. The son pushes on the father and finds himself moving backward at 3 m/s after they have separated. How fast is the father moving.
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