A traveller pulls a suitcase on a smooth airport floor using a strap that makes an…
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A traveller pulls a suitcase on a smooth airport floor using a strap that makes an angle of 25∘ with the horizontal. The strap exerts a constant force of 35N on the suitcase, which moves a distance of 50m along the floor.
(i) Calculate the work done by the force exerted through the strap on the suitcase.
(ii) The mass of the suitcase is 12kg and it starts from rest. Neglecting all other forces, determine the speed gained by the suitcase after moving 50m.
(iii) Keeping the force magnitude and displacement fixed, find the value of the angle between the strap and the direction of motion for which the work done would be zero.