Question

a shopper in a supermarket pushes a loaded cart with a horizontal force of 15 N. if the cart has a mass of 30 kg, how far will it move in 3 seconds if it started from rest

Answer 1

Answer:

The distance covered by the cart is 2.25 meters.

Explanation:

It is given that,

Mass of the cart, m = 30 kg

Horizontal force, F = 15 N

Let d is the distance covered by the cart in 3 seconds if it started from rest. If a is the acceleration of the cart. Using second law of motion as :

$F=ma$

$a=\dfrac{F}{m}$

$a=\dfrac{15\ N}{30\ kg}$

$a=0.5\ m/s^2$

The distance covered by the cart is given by :

$d=ut+\dfrac{1}{2}at^2$

Here, u = 0

$d=\dfrac{1}{2}\times 0.5\times (3)^2$

d = 2.25 meters

So, the distance covered by the cart is 2.25 meters. Hence, this is the required solution.