Dynamics (Forces) Big Review

Front

What is the relationship between the angle of inclination and the friction force on an inclined surface?

Back

As the angle of inclination (θ) increases, the friction force decreases.

Front

What is the normal force acting on an object being pulled at an angle on a horizontal surface?

Back

The normal force is greater than 0 but less than the weight of the object (W).

Front

How does the force required to hold a mass connected to a spring change when the mass is doubled?

Back

If the mass is doubled, the force required to hold the spring extended remains the same if the extension is the same.

Front

What factors affect the acceleration of two weights connected by a massless string over a frictionless pulley?

Back

The acceleration is affected by the difference in weights; the greater the difference, the larger the acceleration.

Front

How do you calculate the tension in a cable lifting an elevator that is accelerating upwards?

Back

Tension (T) = Weight (W) + (mass * acceleration).

Front

What is the formula for calculating friction force on a horizontal surface?

Back

Friction force (f) = coefficient of friction (μ) * normal force (N).

Front

What happens to the friction force when an object is pulled at a constant speed?

Back

The friction force equals the applied force when an object is pulled at constant speed.

Front

What is the effect of a frictionless surface on the motion of an object?

Back

An object on a frictionless surface will continue to move indefinitely unless acted upon by an external force.

Front

What is the significance of a massless string in dynamics problems?

Back

A massless string implies that the tension is the same throughout the string and does not affect the system's dynamics.

Front

How does the weight of an object relate to the normal force when the object is on an incline?

Back

The normal force is less than the weight of the object when on an incline due to the angle of the surface.