A boy of mass $50\ kg$ standing on ground exerts a force of $500\ N$ on the ground. What will be the force exerted by the ground on the boy?

Academic Physics NCERT Class 9

Here, a force of $500\ N$ is exerted on the ground by the boy. According to Newton's third law of motion, the same force $(-500\ N)$ will be exerted in reaction on the boy by the floor.

Tutorialspoint

Simply Easy Learning

Updated on: 10-Oct-2022

71 Views

A boy of mass 50 kg standing on ground exerts a force of 500 N on the ground. The force exerted by the ground on the boy will be:(a) 50 N(b) 25000 N(c) 10 N(d) 500 N
An elephant weighing $40,000\ N$ stands on one foot of area $1000\ cm^2$ whereas a girl weighing $400\ N$ is standing on one ‘stiletto’ heel of area $1\ cm^2$.(a) Which of the two, elephant or girl, exerts a larger force on the ground and by how much?(b) What pressure is exerted on the ground by the elephant standing on one foot?(c) What pressure is exerted on the ground by the girl standing on one heel?(d) Which of the two exerts larger pressure on the ground: elephant or girl?(e) What is the ratio of pressure exerted by the girl to the pressure exerted by the elephant?
A girl weighing $25\ kg$ stands on the floor. She exerts a downward force of $250\ N$ on the floor. What force does the floor exert on her ?
A girl is wearing a pair of flat shoes. She weighs 550 N. The area of contact of one shoe with the ground is 160 cm2. What pressure will be exerted by the girl on the ground if she stands on two feet?
A stone resting on the ground has a gravitational force of 20 N acting on it. What is the weight of the stone? What is its mass? $(g=10 m/s^2)$.
Find the acceleration produced by a force of 5 N acting on a mass of 10 kg.
A girl is wearing a pair of flat shoes. She weighs $550\ N$. The area of contact of one shoe with the ground is $160\ cm^2$. What pressure will be exerted by the girl on the ground :(a) if she stands on two feet ?(b) if she stands on one foot ?
The potential energy of a girl is maximumstandingsleeping on the groundsitting on the groundsitting on the ground
A students caries a bag weighing 5 kg from the ground floor to his class on the first floor that is 2 m high. Calculate the work done by the boy.
A boy throws a rubber ball vertically upwards. What type of work, positive or negative, is done:(a) by the force applied by the boy?(b) by the gravitational force of earth?
The weight of any person on the moon is about 1 /6 times that on the earth. He can lift a mass of 15 kg on the earth. What will be the maximum mass, which can be lifted by the same force applied by the person on the moon?
A \( 8 \mathrm{~m} \) high bamboo tree standing erect on the ground breaks at the height of \( 3 \mathrm{~m} \) from the ground. Its broken part remains attached to the main part. Find distance between the top of the tree and the base of the tree on the ground.
A big wooden box is being pushed on the ground from east to west direction. The force of friction due to ground will act on this box towards:(a) north direction(b) south direction(c) east direction(d) west direction
A boy is standing on the ground and flying a kite with \( 100 \mathrm{~m} \) of string at an elevation of \( 30^{\circ} \). Another boy is standing on the roof of a \( 10 \mathrm{~m} \) high building and is flying his kite at an elevation of \( 45^{\circ} \). Both the boys are on opposite sides of both the kites. Find the length of the string that the second boy must have so that the two kites meet.
According to the third law of motion when a body exerts a force on another body then the other body also exerts force and both are equal and opposite. So when earth exerts a force on a falling apple then the force of the same magnitude should be exerted by the apple also towards earth. So why don't the earth moves towards the apple as force is equal?

Kickstart Your Career

Get certified by completing the course

Get Started

Advertisements