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Let's first imagine the man pushing on a car with the handbrake on. Obviously, the car does not move. The man is applying a force F (let us call it F1). The static friction of the brakes on the car are applying a force we shall call F2.
Now, we know from Newton's laws that F = mass x acceleration (F = ma). The car is not accelerating, so F = 0. That is the net force of the man/car system is zero. So, F1 + F2 = 0, or if you prefer, F1 = -F2.
In this case, the force of the man's feet on the ground cannot overcome the force of the brakes on the wheels. So the car does not move.
Now, what happens if we release the handbrake? If enough force is applied to overcome the friction of the wheels and axles etc, the car will accelerate (a).
The man's feet exert a force on the ground and the ground exerts an equal and opposite for on the man's feet. (Newton's 3rd law)
The friction of the wheels exerts a force on the ground and the ground exerts an equal and opposite force on the wheels. (Newton's 3rd law)
The man exerts a force on the car... and the car exerts an equal and opposite force on the man (3rd law)
But, the force of the man's feet on the ground is greater than the opposing force of the wheel's friction on the ground. Therefore, there is a net force and the "man + car" system accelerates. Note that Newton's 3rd law applies to each pair of objects (car/ground), (car/man), (man/ground) seperately.
What else can I help you with?
What is the reaction force to a man pushing on a car?
The reaction force to a man pushing on a car is the force exerted by the car on the man in the opposite direction. According to Newton's third law of motion, for every action, there is an equal and opposite reaction.
What is a examples of a pushing force?
pushing a pram kicking a ball pushing the door pushing the car
What is the equal and opposite force to the downward force of gravity pulling on a man standing on the beach?
The equal and opposite force to the downward force of gravity pulling on a man standing on the beach is the normal force exerted by the ground pushing back up on the man. This normal force prevents the man from sinking into the ground due to the force of gravity.
A man pushes on a wall with a force of 50 N. What are th size and direction of ghe force that exerts the man?
The wall exerts a reaction force of 50 N on the man, equal in magnitude but opposite in direction to the force that the man exerts on the wall.
A man pushes a large box across a rough wooden floor. The box moves with constant velocity. What can be said about the forces acting on the box?
There is no unbalanced force acting on the box.
What is the reaction force to a man pushing on a car?
The reaction force to a man pushing on a car is the force exerted by the car on the man in the opposite direction. According to Newton's third law of motion, for every action, there is an equal and opposite reaction.
What is a examples of a pushing force?
pushing a pram kicking a ball pushing the door pushing the car
When a man applies some force on a wall of mass 200 kg but the acceleration in the wall is zero find the force applied by the man with the formula F equals ma?
You can't find the force from that data. The TOTAL force must be zero if there is no acceleration - but any force provided by the man, pushing against the wall, is counteracted by the Earth pushing back.
A man and a woman exert a total of 900 N by pushing a car 20 meters across the street. The man exerts twice as much force as the woman. How much work does the man do?
The man exerts a force of 600 N and the woman exerts a force of 300 N. Work done by the man = Force x displacement = 600 x 20 = 12,000 J Hence, the man performs 12,000 joules of work.
What is the action and reaction for a man holding a bucket?
The action is the man exerting an upward force on the bucket to hold it up. The reaction is the bucket exerting an equal and opposite downward force on the man's hand.
What is the equal and opposite force to the downward force of gravity pulling on a man standing on the beach?
The equal and opposite force to the downward force of gravity pulling on a man standing on the beach is the normal force exerted by the ground pushing back up on the man. This normal force prevents the man from sinking into the ground due to the force of gravity.
A man pushes on a wall with a force of 50 N. What are th size and direction of ghe force that exerts the man?
The wall exerts a reaction force of 50 N on the man, equal in magnitude but opposite in direction to the force that the man exerts on the wall.
If a man pushes on a crate with 10 newtons of force and Fred the goat pushes with him with another 10 Newtons of force what is the net force of Fred and the man on the crate?
Fnet = F1+F2Force of man f1 = 10nForce of goat f2 = 10nSo,Fnet = 10+10Fnet=20n================================-- If Fred and the man are both pushing in the same direction, thenthe net force is 20 newtons.-- If they're not both pushing in the same direction, then the net forceis less than 20 N, but we don't have enough information to be able tonail down either the net force or its direction.
A man pushes a large box across a rough wooden floor. The box moves with constant velocity. What can be said about the forces acting on the box?
There is no unbalanced force acting on the box.
A man pushing with a force of 150 N pushed a box 10 m across a room. How much work did he do Remember work force and times distance.?
The work done by the man is 1500 Joules. This is calculated by multiplying the force (150 N) by the distance the box was pushed (10 m). Work is the product of force and distance, in this case, the man exerted a force of 150 N to move the box 10 m across the room.
A man drops a baseball off of the top of the Empire State Building. If the action force is the pull of the Earth on the ball then what is the reaction force?
The reaction force is the push of the ball on the Earth, according to Newton's third law of motion. This means as the Earth pulls the ball downward, the ball also exerts an equal and opposite force back up on the Earth.
What force enables a man to walk on the ground?
Gravity,contact force, friction, air resistance
