A child pushes a 5.0 kg toy cart along a smooth horizontal floor by applying a…
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A child pushes a 5.0 kg toy cart along a smooth horizontal floor by applying a constant horizontal force of 15 N. At the same time, a small retarding force of 3.0 N due to air resistance acts opposite to the motion.
(a) Calculate the magnitude and direction of the net acceleration of the cart.
(b) If the cart starts from rest, determine its speed after 4.0 s of pushing.
(c) Find the distance travelled by the cart in these 4.0 s.