Question

if a engine supplies 100 joules of energy to a weight of 200g . How high it can be lifted ? (given g = 8metre per second square)​

Answer 1

Given,

• Work done by a engine (W) = 100 joule.
• Mass (m) = 200g ↪ 0.2 kg
• Acceleration due to gravity (g) = 9.8 m/s²

To Find,

• How high it can be lifted.

According to the question,

According to work - Energy theorem,

Work done by a engine = Increase in potential energy.

[ Put the values ]

↪ W = m × g × h

↪ 100 = 0.2 × 9.8 × h

↪ 100 = 1.96 × h

↪ h = 100/1.96

↪ h = 51 m

Therefore,

The 51 m high it can be lifted.

Answer 2

Answer:

$\huge \bf \: given$

• Energy supplied = 100 Joules
• Weight of the object that had energy transferred =200 g
• G = 8m²

$\huge \bf \: to \: find$

High can be lifted

$\huge \bf \: solution$

Apply work energy theorem

Work done = M × G × H

$\sf \: 100 = 0.2 \times 9.8 \times h$

$\sf \: 100 = \:1.96 \times h$

$\sf \: h \: = \dfrac{100}{1.96}$

$\sf \: h \: = 51 m \:$