Question

A rickshaw puller pulls the rickshaw by applying a force of 100N. if rickshaw movs with constant velocity 9kmh-1, then power of rickshaw puller is?

Answer 1

Answer:

• Power of rickshaw puller = 250 W

Step-by-step explanation:

Given that:

• A rickshaw puller pulls the rickshaw by applying a force of 100 N.
• Rickshaw moves with constant velocity of 9 km/h.

To Find:

• Power of rickshaw puller.

Formula used:

• Work done = Force × Displacement
• Power = (Work done)/(Time)

Converting 9 km/h into m/sec:

• 1 km/hr = 5/18 m/sec
• 9 km/h = (5 × 9)/18 = 2.5 m/sec

We have:

• Velocity = 2.5 m/sec
• i.e., In time 1 sec displacement is 2.5 m.
• Force = 100 N

Finding the Work done:

⇒ Work done = (100 × 2.5) J

⇒ Work done = 250 J

Finding the Power:

⇒ Power = (250/1) W

⇒ Power = 250 W

Answer 2

Answer:

P = 250 Watt

Step-by-step explanation:

Question:

A rickshaw puller pulls the rickshaw by applying a force of 100N. If the rickshaw moves with constant velocity 9km/h, then power of rickshaw puller is?

Given:

• Force = 100N
• Velocity=9km/hr = 9 $\times\dfrac{5}{18}$ = 2.5m/s

To find:

• Power of the rickshaw puller

Solution:

We know that,

P = fv

where,

• P= Power
• F= Force
• V=Velocity

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P = 100 $\times$ 2.5

P = 250 Watt