Suppose a radio signal travels from earth and through space at a speed of 3.0 × 108 m/s. How far into space did the signal travel during the first 20.0 minutes? Click here to see the answer
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How far away was a lightning strike if thunder is heard 5.00 seconds after seeing the flash? Assume that sound traveled at 350.0 m/s during the storm. Click here to see the answer
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A car is driven at an average speed of 100.0 km/h for two hours, then at an average speed of 50.0 km/h for the next hour. What was the average speed for the three-hour trip? Click here to see the answer
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How long will be required for a car to go from a speed of 20.0 m/s to a speed of 25.0 m/s if the acceleration is 3.0 m/s2? Click here to see the answer
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A bullet leaves a rifle with a speed of 2,360 ft/s. How much time elapses before it strikes a target 1 mile (5,280 ft) away? Click here to see the answer
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A pitcher throws a ball at 40.0 m/s, and the ball is electronically timed to arrive at home plate 0.4625 s later. What is the distance from the pitcher to the home plate? Click here to see the answer
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The Sun is 1.50 × 108 km from Earth, and the speed of light is 3.00 × 108 m/s. How many minutes elapse as light travels from the Sun to Earth? Click here to see the answer
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An archer shoots an arrow straight up with an initial velocity magnitude of 100.0 m/s. After 5.00 s, the velocity is 51.0 m/s. At what rate is the arrow decelerated? Click here to see the answer
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A ball thrown straight up climbs for 3.0 s before falling. Neglecting air resistance, with what velocity was the ball thrown? Click here to see the answer
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A ball dropped from a building falls for 4.00 s before it hits the ground. (a) What was its final velocity just as it hit the ground? (b) What was the average velocity during the fall? (c) How high was the building? Click here to see the answer
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An astronaut and equipment weigh 2,156 N on Earth.Weightless in space, the astronaut throws away a 5.0 kg wrench with a velocity of 5.0 m/s. What is the resulting velocity of the astronaut in the opposite direction? Click here to see the answer
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(a) What is the weight of a 1.25 kg book? (b) What is the acceleration when a net force of 10.0 N is applied to the book? Click here to see the answer
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A 1,500 kg car accelerates uniformly from 44.0 km/h to 80.0 km/h in 10.0 s. What was the net force exerted on the car? Click here to see the answer
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A net force of 5,000.0 N accelerates a car from rest to 90.0 km/h in 5.0 s. (a) What is the mass of the car? (b) What is the weight of the car? Click here to see the answer
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How much centripetal force is needed to keep a 0.20 kg ball on a 1.50 m string moving in a circular path with a speed of 3.0 m/s? Click here to see the answer
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On Earth, an astronaut and equipment weigh 1,960.0 N.While weightless in space, the astronaut fires a 100 N rocket backpack for 2.0 s. What is the resulting velocity of the astronaut and equipment? Click here to see the answer
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