A man weighing 60 kg climbs up a staircase

Asked by admin @ 17/08/2021 in Physics viewed by 285 People

a man weighing 60kg climbs up stair carrying a load of 20kg on his head . the stair case has 20 steps each of height 0.20m. if it takes 10s to climb find the power.

Answered by admin @ 17/08/2021

$we \: are \: given \: that \: \\ mass = 60 + 20 = 80kg \\ hieght = 20 \times 0.2 = 4m \\ and \: g = 10 \frac{m}{ {s}^{2} } \\ and \: time = 10sec$
$now$
$power \: = \frac{energy}{time}$
$power = \frac{mgh}{t}$
$now \: putting \: the \: values \: of \: mass \: m \\ \: height \: h \: and \: acceleration \: due \: to \\ gravity \: g \: and \: time \: t$
$power = \frac{80 \times 4 \times 10}{10}$
$power = 320 \: w$

A hair dryer with a resistance of 9.6 ohms operates at 120 volts for 2.5 minutes. the total electrical energy used by the dryer during this time interval is

Asked by maham237 @ 13/01/2021 in Physics viewed by 1212 persons

Mind map for light reflection and refraction class 10

Asked by admin @ 23/08/2021 in Physics viewed by 1154 persons

The african cicada is the world's loudest insect, producing a sound intensity level of 107 db at a distance of 0.50 m. what is the intensity of its sound (in w/m2) as heard by someone standing 3.1 m away? express your answer in watts per meter squared.

Asked by maham237 @ 10/01/2021 in Physics viewed by 1105 persons

A thief runs at a speed of 10m s

Asked by admin @ 23/08/2021 in Physics viewed by 1101 persons

A 5.8 x 10 4 watt elevator motor can lift

Asked by maham237 @ 20/06/2021 in Physics viewed by 1087 persons

A man weighing 60 kg climbs up a staircase

Similar Questions

A man weighing 60 kg runs along the rails

A man throws a ball of mass 0.5 kg

A man pushes a box of mass 50 kg

A monkey of mass 30 kg climbs a rope

A man weighing 500n carried a load of 100n

How much is 60 kg in pounds

A man carries a load of 50 kg

The speed of a car weighing 1500 kg

An elevator weighing 1000 kg is to be lifted

An elevator weighing 500 kg is to be lifted

A man weighs 600n on earth what is his mass

A 60 kg runner in a sprint moves at 11 m/s. a 60 kg cheetah in a sprint moves at 33 m/s.

How much does a 55 inch tv weigh in kg

A block of metal weighing 2 kg is resting

A 60 kg body is pushed with just enough

Most viewed questions in Physics

Jeevandeep health and physical education std 10 answers pdf

Hc verma physics class 9 solutions of describing motion

How to leave nightmare land answer key

Base area and stability of some objects with different shapes

Which of the following statements about safe lifting are correct

Porous water-absorbing mass of fibers

Absorption of water by filter paper is due to

A composite wire of uniform diameter 3mm

At a distance l 400m from the traffic light

A rocket of mass m is launched straight up with thrust f⃗ thrust.

A hair dryer with a resistance of 9.6 ohms operates at 120 volts for 2.5 minutes. the total electrical energy used by the dryer during this time interval is

Mind map for light reflection and refraction class 10

The african cicada is the world's loudest insect, producing a sound intensity level of 107 db at a distance of 0.50 m. what is the intensity of its sound (in w/m2) as heard by someone standing 3.1 m away? express your answer in watts per meter squared.

A thief runs at a speed of 10m s

A 5.8 x 10 4 watt elevator motor can lift