Question

when a person jumps up -
1.he exerts a force on the ground
2.he exerts a force on himself
3. Both (a) and (b) are true
4. Both (a) and (b) are false​

Answer 1

Option 1 is right. when a person jumps up he exerts a force on the ground

• When we attempt to jump we apply a force on the earth.
• Then Newton's third law of motion comes into play.
• Suppose we apply 1200N force on the earth, the earth will apply 1200N force on our body.
• But in the opposite direction.
• When you jump you are applying a force on the earth in a downward direction.
• But the earth will apply a force of equal magnitude in the upward direction.
• This upward push makes jumping possible.