A mass of 9.22 kg gains 506 J of gravitational potential energy. To what height

Question

A mass of 9.22 kg gains 506 J of gravitational potential energy. To what height was it lifted?

a.) 5.6m

b.) 55m

c.) 27m

d.) 4.6m

A car of mass 1290 kg is traveling along a horizontal road. During a span of 8.9 seconds, the car accelerates from 10.0 m/s to 16.5 m/s. How much work does the car's engine perform on the car during this time?

a.) 791 kj

b.) 111 kj

c.) 692 kj

d.) 340 kj

A non-uniform force is applied to an object as it travels across a linear axis. The graph shows how the magnitude of the force changes with the object's displacement. To which real-life situation does the graph best apply?

a.) twirling a ball at the end of a rope

b.) stretching a spring

c.) launching a cannonball

d.) pushing a box across the floor at constant speed

a.) twirling a ball at the end of a rope

Explanation / Answer

here,

mass of grains , m = 9.22 kg

let the height to it was lifted be h

gravitational potential energy , PE = 506 J

m * g * h = 506

9.22 * 9.81 * h = 506

solving for h

h= 5.6 m

the height to which it was lifted is a) 5.6 m

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