Question

a porter carries 50 bricks to a distance of 50 m in 50seconds , if each brick weighs 1 kg . find his power

Answer 1

Answer :

400W

Explanation :

A porter carries 50 bricks of 1 kg each for 50m in 50seconds.

Calculate the power of the porter.

Here,

If one brick weighs 1kg.

Then, 50 bricks will be weighing = 1*50 = 50kg.

Step 1: calculate the force

We know that,

Force = m × g

Where,

• m(mass) = 50kg.
• Taking g(acceleration due to gravity) as 9.8m/s²

So,

→ 50*9.8

→ 400N

Step 2: Calculate the work

Work done = Force × displacement

We have,

• force = 400N.
• Displacement = 50m.

So, the Work done :

→ 400 × 50

→ 20,000

Step 3: Calculate the power

★ Power : Work done/Time

Where,

• Work done = 20,000
• Time = 50 seconds

So, the Power is :

→ 20,000/50

→ 400W (watt)

—_—_—_—_—_—_—_—_—_—

Formula :

• Work done = force × displacement
• Power = Work/time

Units :

• Force = N(Newton)
• Power = W(watt)
• Time = s(second)
• Work done = J(joules)