A 28 kg child on a swing is traveling at 4.2 m/s and has 315 J of total mechanical energy. What is his gravitational potential energy? How high is he above the ground?

Q: If a 0.50 kg ball is moving at a speed of 12 m/s what is the kinetic energy of the ball? Equation is…

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Q: A 1,505 kg car starts at rest and speeds up to 4.2 m/s with a constant acceleration. If the car…

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Q: An object with a weight of 20 N has a kinetic energy of 612 J, what is the object's speed? To what…

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Q: A 5.5 kg boulder rolling down a hill has kinetic energy of 250 J. How fast is it moving? 64 m/s 10…

A: Given that,                    mass of boulder rolling down (M) :-  5.5 kg…

Q: A 90 kg object begins falling from a height of 250 m. How much potential energy will the object have…

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Q: A boy throws a ball of mass 0.25kg straight upward with an initial speed of 20m/s When the ball…

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Q: object of mass 1kg has a velocity of (i2+j-4)m/s. What is its kinetic energy?

A: Given Mass m = 1 kg Velocity v̅ =( 2î + 4ĵ ) m/s

Q: How much kinetic energy does a 2.5 kg toy car have if it is traveling at a constant velocity of 1.7…

A: Given that, Mass of the toy car is m=2.5 Kg  and  constant velocity is v=1.7 ms

Q: A 72.3 kg student runs up the stairs of a football stadium to a height of 11.1 m above the ground in…

A: Power is defined as the Work Done or Energy per unit time.P=Et The energy of an object of mass m at…

Q: A drone of mass 1.4 kg is flying across the sky 64 m above ground at the speed of 19 m/s   I fyou…

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Q: What is the kinetic energy of a 25 kg dog that is running at a speed of 8.7 m/s (about 19 mi/h)?

A: The formula for kinetic energy is given as follows:K=12mv2 K is the kinetic energy , m is the mass…

Q: It takes 551 N of force to balance the friction force and make a car move at a constant speed. How…

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Q: Tim, with mass 68.8 kg, climbs a gymnasium rope a distance of 3.5 m. The acceleration of gravity is…

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Q: The mass of a bald eagle is 6.3 kg. If the eagle is flying at a speed of 33.5 meters/seconds, what…

A: The relation of the kinetic energy is given in terms of mass and velocity Ek=12mv2

Q: A rock with a mass of 2.40 kg is moving with velocity (6.40î − 2.40ĵ) m/s. What is the…

A: 1) Determine the kinetic energy of the rock.

Q: A truck travelling at a speed of 50 km/h has a kinetic energy of 600 kl. If the speed of the truck…

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Q: The gravitational potential energy of a 0.120 kg bird in a tree is 6.60 J. What is the height of the…

A: The expression for the gravitational potential energy is written as, Here, m, g and h represent the…

Q: A 56.5-kg person is running and accelerates from 3.67 m/s to 8.29 m/s in 5.67 s. How much power does…

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Q: If you push a crate horizontally with 100 N across a 10-m factory floor and friction between the…

A: The horizontal force is 100N, the frictional force is 70N, and the distance moved by the crate is…

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

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Q: A 34.7 kg child rides a 5.30 kg toboggan down a 13.1 m high snowy hill. If the child starts from…

A: Given,

Q: A boy throws a ball of mass 0.23 kg straight upward with an initial speed of 26 m/s. When the ball…

A: The initial and the final heights of the ball are the same. So, the change in mechanical energy will…

Q: A horse pulls a cart with a force of 0.2 kN at an angle of 27 degrees with the horizontal and moves…

A: F = 0.2 kN = 0.2 x 103 N θ = 270 v = 10 kph = 10kmh×1000m1km×1h60min×1min60s = 2.778 m/s t = 12 min…

Q: How fast must a 400 kg motorbike be moving to have a kinetic energy of:  (a) 1,200 J     (b) 1,600…

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Q: A stone with a mass of 2.40 kg is moving with velocity (5.20î – 1.80ĵ) m/s. (HINT: v2 : () What is…

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Q: A 120 kg airplane wheel moves at 98 m/s. how fast must a 2.35 g toy car wheel move in in order to…

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Q: An 0.45 kg apple hangs from a tree and is about to fall to the ground. If the apple is 12 meters…

A: Given, mass, m=0.45 kgheight, h=12 macceleration due to gravity, g=-9.8 ms2Potential energy, U=?…

Q: What is the gravitational potential energy of a 4.0 kg block that is raised 2.50 m from the ground?…

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Q: An 80,000 kg airliner is flying at 990 km/hr at a height of 10 km. What is the total energy…

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Q: 1. A marble weighing 4.0 kg, travels at a speed of 7.0 km/h. What is its kinetic energy? 7km/h 1.94…

A: Mass of marble , m= 4.0Kg Speed, v= 7 Km/h

Q: A 2.75 kg mass is hung from a vertical spring (k = 325 N/m). If the block is pulled 6.5 cm from its…

A: The expression for find potential energy stored in the spring is U=12kx2

Q: What is the kinetic energy of a 3000 lb automobile which is moving at 30 mph? The correct answer…

A: m = 3000 lb      = 1360.78 kg  v = 13.41 m/s  So KE = 1/2 mv^2

Q: What is the kinetic energy of a 900 kg car whose velocity is 16.67 m/s? O 15.0 kJ 125 kJ 12.5 kJ O…

A: Given Mass of car = m = 900 kg Velocity = v = 16.67 m/s We have to calculate the kinetic energy of…

Q: Using 1000. J of work, a small object is lifted from the ground floor to the third floor of a tall…

A: Given parameter                        Work(W) = 1000J                        Time (T) = 20s

Q: What is the kinetic energy of a 738.66 N woman jogging at

A: Given Weight of woman is W=738.66  N Acceleration due to gravity is g=9.80 m/s2. Velocity is v=0.93…

Q: What is the kinetic energy of a 15 kg dog that is running at a speed of 7.0 m/s (about 16 mi/h)?

A: Given mass m = 15 kg speed v = 7.0 m/s  we have to find out kinetic energy

Q: A 5.0-kg box is moving horizontally at 6.0 m/s. In order to change its speed to 10.0 m/s, the net…

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Q: A 0.300 kg billiard ball is propelled from a table at a horizontal speed of 1.50 m/s. If the table…

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Q: What is the kinetic energy of a 1066-kg car moving at 29.8 m/s (66.7 mi/h)? 473.33 MJ

A: The kinetic energy is given by the formula KE =12mv2where m is the mass andv is the velocity

Q: If Sara has a mass of 60 kg and lives on the fifth floor of her apartment 18 m above the ground,…

A: Gravitational potential energy  U = mgh  m = mass of sara = 60Kg g= acceleration due to gravity =…

Q: If a car of mass 1200 kg is moving along a highway at 120 km/h, what is the car’s kinetic energy as…

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Q: What is the gravitational potential energy of a 5.0 kg object that has been raised 12 m above the…

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Q: A 1.6 m tall man lifts 2.1 kg box from the ground to a height 2.2 m above the ground. What is the…

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Q: A 5.00 kg object is lifted from the horizontal to a height 8.50 m. What is the object's…

A: 1. given data mass of object (m) = 5 kg height (h) = 8.50 m

Q: A 5.0 kg object is moving at 4 m/s? By what factor does its kinetic energy change if its mass is…

A: GIVEN: m= 5kg v= 4m/s  Kinetic energy: Kinetic energy is the energy that an item or particle has as…