68. Starting from rest, Megan zooms down a frictionless slide from an initial height of 4.0 m. What is her speed at the bottom of the slide?

Q: A variable force F = 3x²î acts on an object with mass m= 2kg from x=0 to x = 4 meters, where F is in…

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Q: 1. A600-kg rollercoaster car starts at rest atop a 30-meter hill. Determine the speed of the car…

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Q: A 10 kg sled with a kid inside is sliding down a hill on dry snow. At point A, it has a speed of v=…

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Q: A hummingbird has a mass of about 1.7 g. Suppose a hummingbird does 0.15 J of work against gravity,…

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Q: Helen asked her mom to take her to the play ground near her house. She loves to scare her mom by…

A: Mass of Helen m=20.4 kg Helen is initially at a height h=3.30 m Since she starts from rest her…

Q: The graph shows the potential energy as a function of distance for an object moving along the x…

A: The total energy of the object remains conserved, and the potential energy changes into kinetic…

Q: A daredevil on a motorcycle leaves the end of a ramp with a speed of 34.4 m/s as in the figure…

A: Initial speed u = 34.4 m/s Final speed v = 32.0 m/s Maximum height = h

Q: A block slides down a 100m inclined plane. Suppose that the incline is frictionless, what is the…

A: Height of the inclined plane = h = 100 m Speed of the block at the bottom = v = ?

Q: 2. Figure depicts a rider on a water slide. The rider drops from a 32 m high starting point until…

A: initial height = 32 mlet the mass = m

Q: Biological muscle cells can be thought of as nanomotors that use the chemical energy of ATP to…

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Q: A new record for running the stairs of the Empire State Building was set on February 3, 2003. The 86…

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Q: A 69.0-kg athlete leaps straight up into the air from a trampoline with an initial speed of 8.9 m/s.…

A: The objective of the question is to find the kinetic energy of the athlete at the maximum height she…

Q: 1. A frictionless roller-coaster is given a maximum possible initial speed vo= 6 m/s when it is at…

A: Since there is no friction the total mechanical energy remains conserved i.e, it is small at all…

Q: An accelerating object of mass m=18 kg is fired with an initial speed v=9 m/s at a starting point.…

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Q: A car on a roller coaster starts at zero speed at an el ground of 260 m. It coasts down a slope, and…

A: Given: The initial height is h=260 m. The final height is H=100 m. The expression for velocity (v)…

Q: 12. A 15kg rock falls from the top of a building 8m high. Find its PE and KE. (a) when at rest at…

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Q: 00-kg man is škiing across level ground at a speed of 14 m/s when he comes to the small slope 1.8 m…

A: Given, Mass of the man, m=100kg Initial speed, vi=14m/s Height, h=1.8m Initial kinetic energy when…

Q: A 67 kg snowboarder starts at the top of an icy (frictionless) hill with a vertical height of 22 m…

A: height of top(ht)=22m height of middle point(hm)=11m initial speed at top(vi)=15 m/s concept :…

Q: 11. A champion athlete can produce one horsepower (746 W) for a short period of time. The number of…

A: Here , power(p) = 746 W Mass (m) =70 kg  Steps =16 cm =0.16 m Now, P = mgh/ t H = pt /mg  H =…

Q: A 20 kg block starts from rest at point A and slides along a frictionless track. What is the speed…

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Q: .At an amusement park, a swimmer uses a water slide to enter the main pool. If the swimmer starts at…

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Q: A sled, of mass 18.6 kg, is stationary when it starts to slide down an icy hill.  The hill is 13.0 m…

A: Given data:  Initial velocity (u) = 0 m/s Height (h) = 13.0 m Required: The speed of the sled at the…

Q: A 1500 kg car is to accelerate from rest to a speed of 20 m/s in a time of 15 sec as it climbs a 15°…

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Q: (ou cast a pebble a t is about to land in

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Q: Q28. A boy climbs onto a wall that is 3.4 m high and gains 2250 J of potential energy. What is the…

A: Here,  height of the wall (h) = 3.4 m potential energy (U) =2250 J acceleration due to gravity(g)=…

Q: A 65.8-kg skier accelerates down an icy hill from an original height of 521 meters. Use the…

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Q: A 2.9-kg block with a speed of 4.2 slides down a 7.4-m high, frictionless incline. What is the speed…

A: Draw the free-body diagram of the block.

Q: A 101-kg man is skiing across level ground at a speed of 9.5 m/s when he comes to the small slope…

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Q: OK, same sort of track, but now with d = 2.10 m. Now suppose the blocks starts on the track at x =…

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Q: A daredevil on a motorcycle leaves the end of a ramp with a speed of 32.4 m/s as in the figure…

A: velocity, v = 32.4 m/s  horizontal component of velocity, vx = 30.5 m/s

Q: A block is released from rest at point P and slides along the frictionless track shown. Assume hi =…

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Q: A cart moves to the right along a frictionless track. What is the minimum speed of the cart at…

A: Given : Cart traveling to the right through the frictionless track.