Question

if we lift a body of mass 7 kg vertically upwards 10 metre, then calculate the force required to lift a body
take gravitation 10 metre per second square
answer is 70 Newton how explain me step by step??
please tell me it's urgent​

Answer 1

Given:-

• Mass of Body = 7kg

• Initial Velocity = 0m/s ( As it was at rest )

• Acceleration = + 10m/s²

• Distance Travelled = 10m

To Find:-

• The Force required to lift a body

Formulae used:-

• P.E = mgh

• w = F × s

Where,

• P.E = Potential Energy
• m = Mass
• g = Gravitation
• h = Height
• w = Work Done
• F = Force
• s = Distance

How To Solve ?

• Here, given is not enough to use any Newton's Equation.

• So, we will use the Equation of G.P.E. where we will find the Work done.

• Then we will use the Formulae of work done.

Now,

→ P.E = mgh

→ P.E = 7 × 10 × 10

→ P.E = 700J.

Hence, The energy need to lift the body is 700J

Therefore,

→ W = F × S

→ 700 = F × 10

→ F = 700/10

→ F = 70N.

Hence, The Force required to lift the body is 70N.

Answer 2

Answer:

7*10

Explanation: (*)means multiply