Question

A 5kg falls through 400cm. The work done on it by the earth,s gravitational force is​

Answer 1

Answer:

196 J

Explanation:

Given that ,

Mass of body , m=5 kg

Displacement of body , h=400 cm=4 m

Work done by gravitational force, W=mgh=5×9.8×4=196 J

Answer 2

Answer:

Given :-

• A 5 kg falls through 400 cm.

To Find :-

• What is the work done on it by the earth's gravitational force.

Formula Used :-

$\clubsuit$ Work Done Against Gravity Formula :

$\bigstar \: \: \sf\boxed{\bold{\pink{W =\: m \times g \times h}}}\: \: \: \bigstar$

where,

• W = Work Done
• m = Mass
• g = Acceleration due to gravity
• h = Height

Solution :-

Given :

• Mass = 5 kg
• Height = 400 cm = 4 m
• Acceleration due to gravity = 10 m/s²

According to the question by using the formula we get,

$\implies \bf W =\: m \times g \times h$

$\footnotesize \implies \sf Work\: Done =\: Mass \times Acceleration\: due\: to\: gravity\: \times Height$

$\implies \sf Work\: Done =\: 5 \times 10 \times 4$

$\implies \sf Work\: Done =\: 50 \times 4$

$\implies \sf\bold{\red{Work\: Done =\: 200\: J}}$

$\therefore$ The work done on it by the earth's gravitational force is 200 J .