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BAED-PHYC2121 General Physics 1
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A soccer ball (mass = 0.43 kg) is moving at a speed of 20 m/s when it is kicked with a force of 300 N resulting in it going in the opposite direction with the same speed as before. What is the magnitude of the impulse delivered to the ball?
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Suppose the gravitational potential energy for a mass at an altitude of one Earth radius is PE1 and at two Earth radii is PE2. How do the absolute values of these potential energies compare?
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A 1,500-kg automobile moving at 23 m/s has the brakes applied with a deceleration of 8.0 m/s2. How far does the car travel before it stops?
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A ventilation fan has blades 0.25 m in radius rotating at 20 rpm. What is the tangential speed of each blade tip?
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A Hooke's law spring is mounted horizontally over a frictionless surface. The spring is then compressed a distance d and is used to launch a mass m along the frictionless surface. What compression of the spring would result in the mass attaining double the kinetic energy received in the above situation?
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5.1 Uniform Circular Motion
A point on the rim of a 0.30-m radius rotating wheel has a tangential speed of 4.0 m/s. What is the tangential speed of a point 0.10 m from the center of the same wheel?0%
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Popeye, of mass 70 kg, has just downed a can of spinach. He accelerates quickly and stops Bluto, of mass 700 kg (Bluto is very dense), who is charging in at 5.0 m/s. What was Popeye's remarkable speed?100%
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When we subtract a velocity vector from another velocity vector, the result is
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Which is smallest, an atom, a nucleus, a proton, or an electron?
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4.6 Projectile Motion Revisited: The Effect of Air Drag
A sphere is dropped from a great height and when its speed reaches 20 m/s, its acceleration downward is 8.4 m/s2. If the drag force is proportional to the square of the speed, what will be its acceleration downward when its speed reached 40 m/s?0%
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