Question

Early one October, you go to a pumpkin patch to select your Halloween pumpkin. You lift the 2.8 kg pumpkin to a height of 1.0 m , then carry it 50.0 m (on level ground) to the check-out stand. A)Calculate the work you do on the pumpkin as you lift it from the ground.B) How much work do you do on the pumpkin as you carry it from the field?

Answer 1

PART (A):

Mass of pumpkin, m = 2.8 kg

Height to which it is rise, h = 1.0 m

Acceleration due to gravity, g = 9.8 m/s²

Therefore, Work done on the pumpkin for lifting:

W = mgh

W = (2.8 kg) x (9.8 m/s²) x (1.0 m)

W = 27.44 J

-------------------------------------------------------

PART B:

We know that the force acting on the pumpkin is vertical (weight of the pumpkin).

Hence, there is no force along the direction of horizontal displacement.

Therefore, work done on the pumpkin as you carry it from the field = 0 J