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BAED-PHYC2121 General Physics 1
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A 7.0-kg bowling ball strikes a 2.5-kg pin. The pin flies forward with a velocity of 3.5 m/s; the ball continues forward at 6.0 m/s. What was the original velocity of the ball?
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The Earth is 93 million miles (mi) from the Sun and its period of revolution is 1 year = 3.15 × 107 s. What is the acceleration of the Earth in its orbit about the Sun?
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At an altitude of 4 times the radius of the earth, the acceleration due to gravity is
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Preston pushes a wheelbarrow weighing 480 N to the top of a 50.0-m ramp, inclined at 25.0° with the horizontal, and leaves it. Tamara accidentally bumps the wheelbarrow. It slides back down the ramp, during which an 75.0-N frictional force acts on it over the 50.0 m. What is the wheelbarrow's kinetic energy at the bottom at of the ramp? (g = 9.8 m/s2)
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A 5.00-g bullet is fired into a 950-g block of wood suspended as a ballistic pendulum. The combined mass swings up to a height of 9.00 cm. What was the kinetic energy of the bullet immediately before the collision?
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6.5 Conservative Versus Nonconservative Forces and Conservation of Energy
A 50-N crate is pulled up a 5.0-m inclined plane by a worker at constant velocity. If the plane is inclined at an angle of 37° to the horizontal and there exists a constant frictional force of 20 N between the crate and the surface, what is the force applied by the worker?100%
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A satellite is in a circular orbit about the Earth at a distance of two Earth radii above the surface. What is the speed of the satellite? (The radius of the Earth is 6.4 × 106 m, and G = 6.67 × 10−11 N × m2/kg2.)
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Calculate the linear speed due to the Earth's rotation for a person at a point on its surface located at 40° N latitude. The radius of the Earth is 6.40 × 106 m.
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A tennis ball is held above and in contact with a basketball, and then both are simultaneously dropped. The tennis ball bounces off the basketball at a fairly high speed. This is because:
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6.4 More Potential Energy Functions
By how much is the energy stored in a Hooke's law spring increased when its stretch is increased from 4.00 cm to 8.00 cm?0%
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