Question

An object of mass 15 kg is sliding with a velocity of 5 m/s on a frictional horizontal surface. The retarding force necessary to stop the object in 1 second is?


Answer ftafat pilij janta​

Answer 1

Explanation:

Given

• Mass 15kg
• Intial velocity 5 m/s
• Time taken 1 sec

Now formula of force

$f = m \times a$

We find acceleration

$s = ut + \frac{1}{2} a {t}^{2}$

400=0×20+1/2×a×20×20

400=200a

a=400/200

a=2m/s

F=m×a

F=15×2

F=30N