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What is a practical example of how a body can still accelerate even without changing its speed?
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- Can you give a practical example of how a body can still accelerate even without changing its speed? If you can, give me an example and an explanation of itYour friend Travis claims to have set the new world speed record for riding a unicycle. His top speed, he says, was 55 m/s. Do you believe him? Explain.It has been determined that a force over 200 N can injure the hand. What is the shortest period of time it will take to stop a 2 kg object traveling at 75 m/s if the hand is to be protected?
- School bus drivers are extra careful when they cross railroad tracks. They stop before they cross railroad tracks to be sure that there is no train coming. Yet, trains typically move more slowly through towns than cars do. If trains usually move more slowly than cars, why can they do more damage if they hit something in their path?Large birds like pheasants often walk short distances. Small birds like chickadees never walk. They either hop or fly. Why might this be?A car (mass 1000 kg) is traveling at 60 mph (26.82 m/s) when the driver notices a cat 50 m ahead in the road. Wanting to save the feline's life, the driver slams on the brakes and comes to a stop 2 m in front of the cat. What was the car's acceleration as it was braking?
- 20 If you drop a rock from a great height, about how fast will it be falling after 5 seconds, neglecting air resistance? A B с D E It depends on how heavy it is. It depends on what shape it is. 10 m/s 15 m/s 50 m/sWhich of the following situations would result in a greatest impact force: a. the crash is head-on between two identical cars both moving at 30mph and b. the crash is head-on into a stationary brick wall with a velocity at 30mph? Explain why.A city planner is working on the redesign of a hilly portion of a city. An important consideration is how steep the roads can be so that even low-powered cars can get up the hills without slowing down. A particular small car, with a mass of 920 kg, can accelerate on a level road from rest to 21m/s(75Km/h) in 12.5 s. Using these data, calculate the maximum steepness of a hill.
- An constant applied force of 40.1 N lifts an 2.50 kg mass straight up, resulting in a final speed of 3.6 m/s. What distance did the mass move if it was initially at rest?A boy who normally weighs 300 N on a bathroom scale crouches on the scale and suddenly jumps upward. His companion notices that the scale reading momentarily jumps up to 400 N as the boy springs upward. Estimate the boy’s maximum acceleration in this process.Two people, one pushing and the other pulling, move a 350.0 kg crate across a floor (ignore friction) as shown. Starting from rest, how much time will it take for the crate to reach 4.0 m/s?