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Newtons Laws of Motion

The three laws proposed by Sir Isaac Newton to define the concept of a force and describe motion, used as the basis of classical mechanics.

1,508 Questions

What law of motion says that an object will stay in motion unless a greater force acts in it?

This statement is based on Newton's First Law of Motion, also known as the law of inertia. It explains that an object will remain at rest or continue moving in a straight line at a constant speed unless acted upon by an external force.

Which of newton's laws states that the velocity or speed of an object does not change unless a force interferes?

Newton's First Law of Motion (Law of Inertia) states that an object will remain at rest or in uniform motion unless acted upon by an external force.

Does an object on free fall increase in distance proportional?

Yes, in free fall, the distance the object travels increases at a rate proportional to the square of the time elapsed, as described by the equation d = 1/2 * g * t^2, where d is the distance fallen, g is the acceleration due to gravity, and t is the time.

What is the length of a pendulum with a period of 4.48ses?

The equation for the length, L, of a pendulum of time period, T, is gievn by

L = g(T2/4?2),

where g is the acceleration due to gravity. So, for a pendulum of time period 4.48 sec, the length of the pendulum is 4.99 metres (3 s.f).

What does the motion of an object look like after the forces acting on it end?

We don't know what the forces were or in what direction, and we don't know anything

about the object. So we have no idea what its motion looks like when the forces end.

But we do know that whatever speed it has and whatever direction it's moving at the instant

the forces stop, it'll continue in the same direction at the same speed from then on.

What will happen to the value of friction force when external force acting on the body with mass m is increased from zero to F max such that there is impending motion at F max?

The value of the friction force will increase to match and oppose the external force up to a maximum value known as the static friction force. Once the external force exceeds the maximum static friction force, the object will begin to move, and the friction force will decrease to the kinetic friction force, which is generally lower than the maximum static friction force.

How does the first Law of Motion relate to the catapult?

All three play a part. The first applies as the arm swings and launches the projectile. The arm continues to move until it is stopped by the retaining bar and the projectile continues to move until gravity pulls back down or it impacts a structure. The second law is shown by the projectile. A big heavy rock goes slow, a small light rock flies fast. The third comes into play as the catapult launches the projectile it pushes down on the ground and slightly backward. The projectile itself uses the third law when it impacts.

What is the terminal velocity of a water droplet 312 miles wide?

Terminal velocity of an object depends on its size, shape, and weight. For a water droplet that is 312 miles wide, the terminal velocity would be extremely slow, approaching zero, as its size would create significant air resistance and prevent it from falling at any noticeable speed.

What violates newton's first law?

An object accelerating when no external force is applied violates Newton's First Law. Additionally, if an object in motion suddenly stops without any external force acting upon it, it also violates the law.

What would be a violation of Newton's first law of motion?

In classical mechanics, there are no violations that are known. however there are several violations in quantum mechanics.

Newton's First Law is that an object at rest tends to stay at rest (inertia) and an object in motion tends to stay in motion, unless acted on by an outside force. So perpetual motion in theory is not a violation, unless an attempt is made to remove energy from the system. What might seem a violation would be a spontaneous onset of motion without any causative force - this would suggest that there was indeed some force, just not one that was obvious or detectable.

What is the acceleration of a 20-kg block if the net force acting on it is 100 N?

The acceleration of the block is 5 m/s^2. This is calculated using Newton's second law, which states that acceleration is equal to the net force acting on an object divided by its mass. In this case, 100 N ÷ 20 kg = 5 m/s^2.

What does it mean to sat that the net force determines an objects acceleration?

There are many forces acting on a body. But, the moves because of the net force acting on it. So, we can say that the body accelerates because of net force acting on it only.

What will happen if the net force acting on a stantionary object us zero?

If the net force acting on a stationary object is zero, then the object will remain at rest and not move. This is in accordance with Newton's First Law of Motion, which states that an object will remain at rest or in constant velocity unless acted upon by an external force.

What is the difference between net force and newtons third law?

Net force is the overall force acting on an object, calculated by summing up all the individual forces acting on it. Newton's third law states that for every action, there is an equal and opposite reaction. This means that when one object exerts a force on another, the second object will exert an equal force in the opposite direction.

When you push a box across floor n the box resists your push what horizontal force is resisting you?

The horizontal force resisting your push when you push a box across a floor is the force of friction between the box and the floor. This force acts in the opposite direction to the direction in which you are pushing the box.

What is tear out force?

Tear-out force is the amount of forcce an excavator uses to pull a surtain amount of weight. For instance an excavator want´s to pull a conctrete well out of the ground weighing 1000 lbs plus the sand aside the well that´s holding it in place, the excavator needs a tear-out force of 1000 lbs plus the resistance at apr. another 1000 lbs equals an estamated 2000 lbs tear-out force.

Damage is more when two bodies collide from opposite directions than when they collide at any other angle.Is it due to the momentum of the objects or their relative velocities?

The increased damage when two bodies collide head-on is due to the momentum of the objects, which is the product of their mass and velocity. When two bodies collide from opposite directions, their momentums add up, resulting in a greater force of impact compared to collisions at other angles where momentums may partially cancel out.

What happens when someone pushes a chair across the room using newtons second law of motion?

When someone pushes a chair across the room using Newton's second law of motion, the chair accelerates in the direction of the force applied. This acceleration is directly proportional to the force applied and inversely proportional to the mass of the chair. As long as the force is greater than any opposing forces like friction, the chair will continue to accelerate in the direction of the push.

What is an unbalance force according ti newton first law of motion?

An unbalanced force is a force that does not have an equal and opposite force acting upon it. According to Newton's first law of motion, an unbalanced force will cause an object to accelerate or change its motion. If there is no unbalanced force acting on an object, it will remain at rest or continue moving at a constant velocity.

When the box is moving it experiences a friction force of 20 N to the left or toward the mover What force does the mover need to apply in order to keep the box moving to the right at 1 m s?

The force the mover needs to apply to keep the box moving to the right at 1 m/s is 20 N to overcome the friction force acting to the left on the box. So, the total force applied by the mover in the right direction should be greater than 20 N to maintain the constant velocity of 1 m/s.

What way is the net force acting on a ball thrown in the air with upward velocity?

The net force acting on a ball thrown in the air with upward velocity is the force of gravity acting downwards. Gravity causes the ball to accelerate towards the ground. At the highest point of its trajectory, the net force is zero since the upward velocity is momentarily halted before the ball begins to fall back down.

What force acts as the centripetal force for a plane?

In a plane, the centripetal force required to maintain a circular path is provided by the lift force generated by the wings. As the plane turns, the wings generate a component of lift that acts towards the center of the circle, providing the necessary centripetal force.

What are some examples of newtons second law in space?

In space, Newton's second law can be observed in how a spacecraft accelerates or changes direction when thrusters are fired. The law explains that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This means that to accelerate a spacecraft in space, a force needs to be applied, considering the spacecraft's mass.

Why is it easier to successfully tackle a 70 kg man than a sumo wrestler?

Providing velocity is constant (say they are both running at 0.5ms-1).

The concept of momentum applies in this problem. The sumo wrestler (assume 165kg) will have more momentum despite moving at the same speed.

Momentum is given as the formula p = mv

Where p is momentum, m is mass and v is velocity.

The momentum of the sumo wrestler is 160 x 0.5 = 80kgms-1

The 70kg man has a momentum of:

70 x 0.5 = 35kgms-1

As you can see, the sumo wrestler has a momentum of 80kgms-1 as opposed to the man with a momentum of 35kgms-1.

The person with the more momentum is therefore harder to tackle and more difficult to bring to a stop.

How the direction of the force of kinetic friction is related to the direction of an object's motion?

The direction of the force of kinetic friction is opposite to the direction of an object's motion. This is due to the fact that kinetic friction acts to oppose the relative motion between the object and the surface it is moving on. As the object moves forward, the kinetic friction force acts in the opposite direction in an effort to slow down or stop the object.

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