Newtons Laws of Motion

Angular velocity just means how fast it's rotating.

If youaa want more angular velocity, just rotate it faster or decrease the radius (move it closer to the center of rotation).

Just like force = rate of change of momentum, you have torque= rate of change of angular moment

Or

We can increase the angular velocity of a rotating particle by applying a tangential force(i.e. accelaration) on the particle.

Since the velocity of the particle is tangential with the circle along which it is moving, the tangential accelaration will not change the diriction of the velocity(as angle is 0),but will cause a change in magnitude. Thus angular velocity will increase.

If the sum of all the forces acting on a moving object is zero, the object will continue to move at a constant velocity in the same direction. This is described by Newton's First Law of Motion, which states that an object will remain in its state of motion unless acted upon by an external force.

Newton's First Law of Motion states that an object in motion stays in motion unless acted upon by an external force. When light passes near the sun, its path bends due to the sun's gravitational force acting as an external force, causing a deviation from a straight line. This effect is known as gravitational lensing and is a prediction of Einstein's general theory of relativity.

A wheelchair ramp is a real life example of an inclined plane. It allows individuals in wheelchairs to move between different elevations with less effort than a direct vertical ascent. The ramp's incline reduces the force needed to push the wheelchair up an otherwise steep slope.

The net force on the car acts on the line between the center of the car

and the center of the circle.

Its strength depends on the size of the circle and the speed of the car.

The relationship between force and acceleration is defined by Newton's second law of motion, which states that the acceleration of an object is directly proportional to the force acting on it and inversely proportional to its mass. This means that if a greater force is applied to an object, it will experience a greater acceleration, assuming its mass remains constant. Conversely, if the mass of an object increases, a greater force is needed to achieve the same acceleration.

To change an object's velocity, you can apply a force in the direction you want it to accelerate. This force can be produced by pushing, pulling, or using any other method of applying force to the object. Additionally, altering the mass of the object or the direction of the force can also change its velocity.

This is done in order to get unbalanced force act on the pendulum. A torque will act due to gravitation of the earth and the tension in the string as they then act at different points and opposite direction on the pendulum. Have the forces act at the same point, the formation of torque would have been ruled out and the pendulum would not swing.

Hi, I would like to know the real/original name of the 'chain hoist/pulley' I was taught 50 years ago when of doing O levels physics. I guess it was the inventor's name. Obviously we can still buy them but they only call them a chain hoist or pulley. thks john 23.11.10

The basis for this statement lies in Gauss's Law, which states that the total electric flux through a closed surface is proportional to the total charge enclosed by that surface. As a result, electric field lines must either begin on positive charges and end on negative charges, or form closed loops in cases where there are no charges present.

Suppose a ball falls from rest from height h, then by equation of motion:

h=1/2*g*t2 . and for horizontal motion, x=vx*t. put value of t in first equation:

h=1/2*g*x2/v2, or

x=(h*2*v2/g)1/2. or

x=k*h1/2, so

x1/h11/2=x2/h21/2;

put the values,

x1=601/2*76/44.11/2;

Work with calculator now......

Friction. You need friction to be able to exert a force against the floor, so that you can balance yourself and move in the direction you want to move.

assuming its not starting at zero, if an object velocity is doubled, its kinetic energy (KE) is four times. If its trebled , its KE is nine times

equation : KE = (m*v^2)/2 joules

m=mass

v=velocity

Sir Isaac Newton's three laws of motion are:

1. An object will remain at rest or in uniform motion unless acted upon by an external force.
2. The force acting on an object is equal to the object's mass multiplied by its acceleration.
3. For every action, there is an equal and opposite reaction. These laws were first published in Newton's work "Philosophiæ Naturalis Principia Mathematica" in 1687.

An object can move if no net force is acting on it if it was already in motion and experiences no opposing forces to stop it. Inertia allows an object to maintain its state of motion unless acted upon by an external force.

Newton's first law of motion states that an object at rest will stay at rest, and an object in motion will stay in motion with a constant velocity, unless acted upon by an external force. This law describes the concept of inertia, which is the tendency of an object to resist changes in its motion.

It refers to discus because when you throw the discus, it will keep going in one direction until something hits it, then it will go in the direction it gets it. But if the wind effected it's direction, that would also refer to newton's first law of motion since his 1st law of motion is:

"An object at rest will remain at rest until an outside force acts upon it. "

Using the formula F = ma, where F is the net force, m is the mass, and a is the acceleration, we can rearrange the formula to solve for acceleration: a = F/m. Plugging in the values, we get a = 26/4 = 6.5 m/s^2. Therefore, the acceleration of the object is 6.5 m/s^2.

No, because the amount of force you have applied to the rock cancels with the reaction force from the rock pushing back. Action- reaction. Think about the different types of energy you need to consider:

½mv²

mgh

and possibly rotational ½iω²

Have you given the rock any of these things? If not then there has been no transfer of energy, save possibly the heat from your hands

Drag (air resistance). When a falling object reaches terminal velocity (continues to fall at a constant speed, but acceleration stops), the force of drag and the force of gravity are equal, but opposite in direction.

The answer to both of your questions lies in the different nature of both quantities, momentum and kinetic energy. Momentum is a vector, kinetic energy is a scalar. This means that momentum has a magnitude and a direction, while kinetic energy just has a magnitude. Consider the following system: 2 balls with equal mass are rolling with the same speed to each other. Magnitude of their velocities is the same, but the directions of their velocities are opposed. What can we say about the total momentum of this system of two balls? The total momentum is the sum of the momentum of each ball. Since masses are equal, magnitudes of velocities are equal, but direction of motion is opposed, the total momentum of the system of two balls equals zero. Conclusion: the system has zero momentum. What can we say about the total kinetic energy of this system? Since the kinetic energy does not take into account the direction of the motion, and since both balls are moving, the kinetic energy of the system will be different from zero and equals to the scalar sum of the kinetic energies of both balls. Conclusion: we have a system with zero momentum, but non-zero kinetic energy. Assume now that we lower the magnitude of the velocity of one of the balls, but keep the direction of motion. The result is that we lower the total kinetic energy of the system, since one of the balls has less kinetic energy than before. When we look to the total momentum of the new system, we observe that the system has gained netto momentum. The momentum of the first ball does not longer neutralize the momentum of the second ball, since the magnitudes of both velocities are not longer equal. Conclusion: the second system has less kinetic energy than the first, but has more momentum. If we go back from system 2 to system 1 we have an example of having more kinetic energy, but less momentum. I hope this answers your question Kjell

The invariant quantities such as angular momentum, linear momentum and possibly energy (although that is generally considered thermodynamics) are all still conserved in special relativity.

What does happen however is that the equations for these invariants do change. For example, linear momentum according to Newton is simply mass times velocity but in Einstein's theory it becomes mass times velocity times a new thing called the gamma factor (which is almost equal to unity at low velocities so Newton did not detect it, but becomes very large close to the speed of light (the gamma factor is infinite at the speed of light)).

Special relativity also predicts the existence of spin which is related to angular momentum, but spin does not exist in Newton's theory.

If the net forces on an object are balanced, the object will remain at rest or continue to move at a constant velocity. You can determine if forces are balanced by calculating the sum of the forces in each direction (e.g., horizontal and vertical) and comparing them. If the sum of the forces in each direction is zero, the forces are balanced.

The net downward force on an object is the total force acting on the object in the downward direction after considering all forces, such as gravity and any applied forces, acting on the object. It is calculated by summing up all the individual forces acting downwards on the object.