39. A 58 kg pole vaulter needs to vault a height of 6.0 m. Assuming that all his kinetic energy can be used for the vault, what is the speed that the vaulter must be traveling in order to clear this height? Ignore the elastic potential of the bent pole. A. 9.8 m/s B. 15 m/s C. 11 m/s D. 36 m/s

Q: (1) a 60-meter tall hill and rolls down the slope at an angle of 45°. (a) A 100 kg roller coaster…

A:

Q: 8. How much work is required to raise a 100g block to a height of 200 cm and simultaneously give it…

A: Given data: Mass (m) = 100 g = 0.100 kg Height (h) = 200 cm = 2.00 m Initial velocity (v0) = 0 m/s…

Q: A bicycle racer, with a mass of 84 kg, is has the same amount of kinetic energy as a car traveling…

A:

Q: What will be the resulting kinetic energy in kJ if the log falls down the waterfalls with a velocity…

A: Given: Mass of the log, M=50Kg Velocity of a floating log, vi=10ft/s=3.048m/s Velocity of log falls…

Q: 4. A roller coaster car tops the highest point of the ride (200 ft above the ground) at 10 ft/s .…

A: conservation of Mechanical Energy states: total amount of mechanical energy in a closed system in…

Q: 7. Write a statement that describes the impact on kinetic energy of increasing the speed of an…

A:

Q: Question 27 A 300 kg cannon fires a 5 kg ball. If the kinetic energy of the ball is 1.2×10$ J, what…

A:

Q: 2. It takes 185 kJ of work to accelerate a car from 23.0 m/s to 28.0 m/s. What is the car's mass?

A: Given: The total work done is 185 kJ. The initial speed of the car is 23 m/s. The final speed of the…

Q: 1. A cart is loaded with a brick and pulled at constant speed along an inclined plane to the height…

A: Since you have posted multiple questions we will solve the first question for you .If you want any…

Q: A pendulum is made by tying a 580 gg ball to a 52.0 cm -long string. The pendulum is pulled 22.0 ∘∘…

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Q: A 5.2 g marble is fired vertically upward using a spring gun. The spring must be compressed 8.9 cm…

A:

Q: 3. The potential energy U in Joule of a particle of mass is 4kg moving in the x-y plane is given by…

A: Given data: Potential energy of the particle is given as, U= 6x + 8y + 5 Where, x and y are the…

Q: 4) A block of 1 kg falls from a vertical cliff of height 100m. a) Calculate the velocity of the…

A: Hai, since there are multiple sub parts posted, we will answer the first three sub parts. (a) The…

Q: 25. Review. You can think of the work-kinetic energy theorem GP as a second theory of motion,…

A: a) Let the mass of the bullet be denoted by m.The initial and final velocity of the bullet be…

Q: 12. What is the potential energy of a 3kg ball that is on the ground?

A: Given Mass of the ball is m=3 kg Height of the ball at the ground is y0=0

Q: 10. What is the kinetic energy of a 1900 pound car travelling at 40 meters per second? No new data…

A:

Q: KE-1 a) A 1,500kg car is traveling at 30.0m/s. How many joules of kinetic energy does the car have?…

A: kinetic energy of object is given as   K.e = 1/2 mv2 here m = mass of object  v = velocity of…

Q: A sledder with a total mass 40.0 kg (including the sled) slides down a 10.0m hill that is 20◦ from…

A: i. Kinetic energy of the sledder at the bottom of hill Ek=12mv2=12(40.0 kg)5.5 m/s2=605 J

Q: 6. An 85-kg football player traveling 5.0 m/s is stopped in 1.0 s by a tackler. (a) What is the…

A: knowns: m=85 kgvi=5.0 m/st=1.0s unknowns: kinetic energy Kaverage power P

Q: 7. A ball is thrown straight up. Neglecting air resistance, which statement is not true regarding…

A: A ball is thrown straight up with some initial velocity. Air resistance is neglected.

Q: 1. The shot is 1.2 m above the ground at 10 m/s when a shot-putter fires a 5 kg shot. It reaches 5 m…

A: Initial kinetic energy = (1/2)×mv2  Ki = (1/2)×5×102 = 250 J  Initial potential energy = mgh  Ui =…

Q: 1.A cyclist moving with a speed of 8 m/s has a kinetic energy of 1500 J. What is the mass of the…

A: Given data:  Speed (v) = 8 m/s Kinetic Energy (KE) = 1500 J Required: Mass (m)

Q: A 55 kg snowboarder begins his run at the top of a 50.0 m tall hill with a speed of 0.5 m/s. What is…

A: (given) Mass of snowboarder = 55 kg Speed vi at the top of the hill = 0.5 m/s…

Q: A 6.5 g marble is fired vertically upward using a spring gun. The spring must be compressed 9.1 cm…

A:

Q: A spring-loaded toy gun is used to launch a 10 g plastic ball. The spring, which has a spring…

A:

Q: 8) A baseball of mass m arrives at a batter with speed v. The batter swings, and hits the ball. The…

A: The workdone by the bat is nothing but the change in the kinetic energy of the ball. So, all we have…

Q: 12.Superman wanted to launch a small rocket using a spring mounted vertically on the ground. He…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: 46.3-g golf ball is driven from the tee with an initial speed of 44.8 m/s and rises to a height of…

A: Given  Initial velocity u  = 44.8 m/s Mass m = 46.3 g = 46.3 ×10-3 kg  Maximum height H = 20.5 m

Q: 3) A student throws a 0.22 kg rock horizontally at 20.0 m/s from 10.0 m above the ground. Ignore air…

A: Given data: The mass of rock is m=0.22 kg. The horizontal speed of rock is v=20.0 m/s. The height…

Q: 20 An object with a mass of 500 g is released from a height of 50 m. Since the air friction is…

A: Given:-             The mass of the object  = 500 kg                             height = 50 m…

Q: 25. A bicyclist pedals a distance d at constant speed on a level stretch of road. She then pedals up…

A: The energy diagram has been explained below:

Q: 32. A pole-vaulter just clears the bar at 5.80 m and falls back to the ground. The change in the…

A: Given data The height is h=-5.80 m The potential energy is EP=-3.70×103 J The potential energy is,…

Q: 1. Calculate the potential energy, kinetic energy, mechanical energy, velocity, and height of the…

A: Mass (m) = 60 kg Velocity (v) = 8 m/s

Q: 14. A hiker wearing a backpack stands on a hill at an altitude of 50 m, which would decrease the…

A: Gravitational PE = Mass x Height x g If hiker moves up the hill, H increases so gravitational PE…

Q: Q4/ A body of mass 1 kg move along the Y-axis, its position varied with time according to equation y…

A: m=Mass of object=1 kg The position function is y=5t4+4t5+2t3+t+2

Q: A 0.50 kg stone is dropped from rest from the top of a 2.0 m high wall. At the start of the drop,…

A:

Q: A 25 kg boy is swinging on a 2.5 m long chain. He swings up to a 50° angle. What is the final speed…

A: Using Energy conservation between Initial and final point of swing KEi + PEi = KEf + PEf KEi = 0,…

Q: 6. A 1400-kg car is moving at a speed of 25 m/s. How much kinetic energy does the car have?

A: Given Data: The mass of the car is, m = 1400 kg. The speed of the car is, v = 25 m/s. The kinetic…

Q: 3. A car is initially travelling at 5.00 m/s and then accelerates to a final velocity of 15.0 m/s in…

A: Initial velocity of car (u) = 5 m/s final velocity (v) = 15 m/s time taken to increase the velocity…

Q: Question 23 A toy gun fires a 9.41 g projectile disc by using a compressed spring (k= 1720N/m). The…

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Q: An object of mass 15 kg is moving with a uniform velocity of 4 m s-¹. What is the kinetic energy…

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Q: 1. An object accelerates from 4 m/s to 9m/s. determine the mass of the object if the net work done…

A: Given:-1)  object accelerates from 4m/s to 9m/s  The net wok done by the objcet is W= 350 J 2) if…

Q: 7. A ball is thrown straight up. Neglecting air resistance, which statement is not true regarding…

A:

Q: 5. A bullet with a mass of 0.01 g is fired from a rifle with a barrel that is 0.85 m long. a. Do an…

A:

Q: 41. A 47.0-g golf ball is driven from the tee with an initial speed of 52.0 m/s and rises to a…

A: m=Mass of ball=47 gu=Initial velocity of ball=52 m/sh=Height of the ball=24.6 mg=Acceleration due to…

Q: 1. A car gradually slows down as it brakes. From an energy perspective, this happens because of…

A:

Q: 2. A seagull is trying to eat a 5.8 kg crab it picked up from the beach and it needs to break the…

A: Given data: The mass of crab is m=5.8 kg. The kinetic energy is KE=12.5 J.

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.