Question

A bus moving witb a velocity of 60km/h has a weight of 50tonnes find the force required yo stop it in 10 sec

Answer 1

Hii friend,

we know that,

W= mg

To find "m":-

m= W/g

m= 50/10

m= 5 kg....

To find acceleration:-

A= velocity/time

a= 60km/hr//10

v=60km/hr => 16.7 m/s

a= 16.7/10

a= 1.67 m/s²

To find force:-

F= ma

F= 5×1.67

F= 8.35 N (appx...)

Hour this helps you

Answer 2

$\maltese \: \red{\mid{\underline{\overline{\textbf{Answer}}}\mid}}$

Weight of a body is the force applied by a planet on the body. It is the product of mass of body and acceleration due to gravity of planet. Represented by :-

$\maltese \: w = mg$

Force on a body is a push or a pull.It is the product of of mass and acceleration of a body.

Represented by :-

$\maltese \: f = ma$

Acceleration of a body is the rate of change of its velocity.Represented by :-

$\maltese \: a = \frac{v - u}{t}$

$\blue{\mid{\underline{\overline{\textbf{Coming to question :-}}}\mid}}$

It is given that :-

• Weight of body = 50t = 50,000kg
• Velocity of body = 60km/h =16.6m/s
• Time = 10s

Now after inputting these values in given formula we get :

$\maltese \: w = mg$

$50000 = 9.8m$

$\maltese \: m = \frac{50000}{9.8} = 5102kg$

Therefore the mass of body is 5102kg.

Now acceleration of body is : velocity /time

$= \frac{60}{10} = 6$

Now force = mass × acceleration

$\maltese \: f = 5102 \times 6 = 30612newton$

Therefore force applied on body is 30612N.

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BY SCIVIBHANSHU

THANK YOU

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