A bird is flying through through the air... What forms of mechanical energy does this bird possess?
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Given:
The energy possessed by the bird flying in the air.
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- A 10.0 kg bowling ball falls from a 5.0 m shelf. Just before hitting the floor, what will be its kinetic energy? (g = 9.80 m/s2 and assume air resistance is negligible)A sprinter with a mass of 55 kg is running at a speed of 3.8 m/s. In a burst of speed to win the race, she increases her speed to 5.9 m/s. Determine the work that the sprinter does to increase her speed.Two people pull a block on a rough horizontal surface. One suggests to use a rope that is inclined at angle 70° and another suggests to use a rope at angle 20°. If they pull for the same horizontal distance with the same strength of force, which person does more work? At the end of the same distance pulled, which block is moving faster? Instead, the surface over which the blocks move is now frictionless. How does this change your answers to the questions above?
- A woman swimming upstream is not moving with respect to the shore. Is she doing any work? If she stops swimming and merely floats, is work done on her? Explain comprehensively.A car is sitting at the top of a hill at rest. It rolls down the hill and runs into a spring at the bottom. When the spring is compressed the car has no motion. The energy equation for this scenario is...The roller coaster has a PE of 10,000 J when it begins its downhill run. How much total energy does it have when it is halfway down the hill? Which answer below is correct 10,000 J 5,000 J 10,000 N 5,000 N
- . You use 40 J of energy to rise a 250 N object. How far high did you lift it?Your humble physics Professor elevates a ball hanging from a string away from it's lowest position and holds it there. It requires 105 J of Energy to do this. What is the balls change in PE ? 100 J O 105 J O Not enough information to answer this question O 50 JRank the following bodies in order of their kinetic energy, from least to greatest along with reasons. (i) a 4.0-kg body moving at 10.0 m/s; (ii) a 2.0-kg body that initially was at rest and then had 60 J of work done on it; (iii) a 2.0-kg body that initially was moving at 8.0 m/s and then had 40 J of work done on it; (iv) a 4.0-kg body that initially was moving at 10 m/s and then did 80 J of work on another body.