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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.
Wiki User
∙ 10y ago
Wiki User
∙ 10y agoIt is the friction between the wheels of a car and the road on which the car is travelling which enables the car to move forward. If the road is too slippery (which can happen if it is covered in ice) the wheels would just spin in place, without pushing the car forward.
Wiki User
∙ 11y agoaction force
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What is the reaction force to a man pushing on a car?
it is a mechanical force , so the reactant force on the man is not just the reactive force bt also the frictional force
What is a examples of a pushing force?
pushing a pram kicking a ball pushing the door pushing the car
What will be the reaction if the action is you leaning on a wall?
The reaction is the wall pushing back on you.
How is physics principle involved in swimming?
Archimede's principle. The weight becomes less as there comes the buoyant force pushing up Second Newton's third law. For every action there is equal and opposite reaction Conservation of energy. Using biological energy work is one in pushing water backward and there by water pushes the man forward
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.?
1,500 J
What is the reaction force to a man pushing on a car?
it is a mechanical force , so the reactant force on the man is not just the reactive force bt also the frictional force
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.
What will be the reaction if the action is you leaning on a wall?
The reaction is the wall pushing back on you.
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.
How is physics principle involved in swimming?
Archimede's principle. The weight becomes less as there comes the buoyant force pushing up Second Newton's third law. For every action there is equal and opposite reaction Conservation of energy. Using biological energy work is one in pushing water backward and there by water pushes the man forward
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 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.?
1,500 J
What force enables a man to walk on the ground?
Gravity,contact force, friction, air resistance
When was Reaction - The Spectacular Spider-Man - created?
Reaction - The Spectacular Spider-Man - was created on 2008-05-03.
Which of newton's laws desrcibes the motion of an object that has a net force of 0?
First and Third law. The Universe is quaternion consisting of a scalar and three vectors. Newton's 1st law has both forces zero. The 3rd law is a separate statement of the vector force being zero.
Is it legal for a cop to force you to allow a repo man to tresspass?
repo men are allowed to be on the property... once they have possession of the car, it is legally theres.
