Question based on laws of motion (inclined motion )

In summary, the three laws of motion, also known as Newton's laws of motion, are fundamental principles that describe the behavior of objects in motion. They state that an object at rest will remain at rest unless acted upon by an external force, the force acting on an object is equal to its mass multiplied by its acceleration, and for every action, there is an equal and opposite reaction. An inclined plane affects motion by changing the direction and magnitude of the force needed to move an object. The force of an object on an inclined plane can be calculated using the formula F=mg sinθ. An object on an inclined plane can have a constant velocity if the net force acting on it is equal to zero. The mass of an object does not
  • #1
Abhishek_R
1
0

Homework Statement


what is the value of F needed so that block begins to move upward on frictionles incline plane .

Homework Equations

The Attempt at a Solution


i made an attemp and got the answer - Mgtan(thetta)
but the real answer is - mgtan(thetta/2)
 
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  • #2
Hi Abhishek_R, Welcome to Physics Forums.

You'll have to describe your problem more clearly: How (in what direction) is the force F applied? How is the angle ##\theta## defined?

Did you draw a Free Body Diagram? Show us the work you did on your attempt.
 

1. What are the three laws of motion?

The three laws of motion, also known as Newton's laws of motion, are fundamental principles that describe the behavior of objects in motion. They are:
1. An object at rest will remain at rest unless acted upon by an external force.
2. The force acting on an object is equal to its mass multiplied by its acceleration (F=ma).
3. For every action, there is an equal and opposite reaction.

2. How does an inclined plane affect motion?

An inclined plane, or ramp, affects motion by changing the direction and magnitude of the force required to move an object. It reduces the force needed to move an object vertically, but increases the distance the object must travel. This allows objects to be moved more easily, such as using a ramp to move heavy objects up or down.

3. How do you calculate the force of an object on an inclined plane?

The force of an object on an inclined plane can be calculated using the formula F=mg sinθ, where F is the force, m is the mass of the object, g is the acceleration due to gravity, and θ is the angle of the incline. This formula takes into account the weight of the object and the angle of the incline.

4. Can an object on an inclined plane ever have a constant velocity?

Yes, an object on an inclined plane can have a constant velocity if the net force acting on the object is equal to zero. This means that the force of gravity pulling the object down the incline is balanced by an equal and opposite force, such as friction or an applied force, pushing the object up the incline.

5. How does the mass of an object affect its motion on an inclined plane?

The mass of an object does not directly affect its motion on an inclined plane, as the acceleration due to gravity is constant regardless of the mass of the object. However, a heavier object will require more force to be moved up an inclined plane compared to a lighter object, as described by Newton's second law of motion (F=ma).

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