Question

Find the time for which a force of 1 kgwt acts on a body of mass 1 kg moving with a uniform speed of 4 m/s to stop the body.​

Answer 1

Que -

Find the time for which a force of 1 kgwt acts on a body of mass 1 kg moving with a uniform speed of 4 m/s to stop the body.

Ans :-

Given,

force = 10 N

Mass = 1 kg

Speed = 4 m/sec

time = ?

force = mass × acceleration

$acceleration = \frac{force}{mass}$

$acceleration = \frac{10}{1}$

acceleration = 10 m/sec^2

$acceleration = \frac{velocity}{time}$

$time \: = \frac{velocity}{acceleration}$

$time = \frac{4}{10}$

time = 0.4 sec

Hope helpful...

❤❤❤

Answer 2

Given:

Force of 1 kgwt acts on mass of 1 kg. Initial velocity is 4 m/s.

To find:

Time taken to stop ?

Calculation:

Let's convert force unit from kgwt to Newton. 1 kgwt basically refers 1g N force.

• Force = 1 kgwt = 1 × 10 = 10 N.

So , acceleration = F/m = 10/1 = 10 m/s².

Applying EQUATIONS OF KINEMATICS:

$\sf \: v = u + at$

$\sf \implies \: 0= 4 + ( - 10)t$

$\sf \implies \: 10t= 4$

$\sf \implies \: t= 0.4 \: sec$

So, time taken to stop is 0.4 seconds.