Force = mass x acceleration
F = ma In the problem we know the force exerted, the mass and the acceleration.
F = 500 N
m = 50 kg
a = 9 m/s2
How much force was needed to get a 50 kg object to accelerate at 9 m/s2?
Use the formula.
F = ma
=50 x 9
=450 N
Force applied = 500 N
Friction Force = 500 - 450
=50 N
It is true. Such forces always come in pairs. (This is related to Conservation of Momentum.) Of course, the effect of such a force on the Earth - the amount Earth accelerates, if you release the grapefruit - will be much less than the effect on the grapefruit (by Newton's Second Law).
I believe earth eats the apple. that's it.
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.
If an object accelerates, there must be a force acting on it according to newton's second law, so I would answer true.
Gravity is approximately a 9.8 newton force towards the center of the earth.
50 Newton.
It is true. Such forces always come in pairs. (This is related to Conservation of Momentum.) Of course, the effect of such a force on the Earth - the amount Earth accelerates, if you release the grapefruit - will be much less than the effect on the grapefruit (by Newton's Second Law).
A newton is a measure of force. The force that accelerates 1 kilogram by 1 meter / second2 is defined as 1 newton.
While it isn't clear what "it" refers to, in general, the answer is yes - according to Newton's Third Law.
I believe earth eats the apple. that's it.
newton
newton
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.
[Simple Explanation]As friction is a force and the S.I. unit of force is Newton,the S.I. unit of friction is Newton.[Derivative Explanation]F=µN,where F is Frictional force,µ is coefficient of friction,and N is net normal reaction.N = -mgwhere mg is gravitational force whose SI unit is Newton.-(1)Coefficient of friction is dimensionless. -(2)From (1) and (2), SI unit of F = SI unit of N x SI unit of µ = NewtonHence SI of Friction is Newton.
Yes. This is Newton's Third Law,
If an object accelerates, there must be a force acting on it according to newton's second law, so I would answer true.
If an object accelerates, there must be a force acting on it according to newton's second law, so I would answer true.