MEDIUM
Diploma
IMPORTANT
Earn 100

A block of mass 15.0 kg rests on a horizontal table. A force of 50.0 N is applied vertically downward on the block. Calculate the force that the block exerts on the table.

Important Questions on Mechanics

MEDIUM
Diploma
IMPORTANT

A block of mass M is connected with a string to a smaller block of mass m. The big block is resting on a smooth inclined plane as shown in the diagram. Determine the angle of the plane in terms of M and m in order to have equilibrium.

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EASY
Diploma
IMPORTANT
Describe under what circumstances a constant force would result in an increasing acceleration on a body and a decreasing acceleration on a body.
EASY
Diploma
IMPORTANT
A car of mass 1400 kg is on a muddy road. If the force from the engine pushing the car forward exceeds 600 N, the wheels slip (i.e. they rotate without rolling). Estimate the car’s maximum acceleration on this road.
MEDIUM
Diploma
IMPORTANT
Get in an elevator and stretch out your arm holding your heavy physics book. Press the button to go up. Describe and explain what is happening to your stretched arm. Describe and explain the same as the elevator comes to a stop at the top floor. What happens when you press the button to go down? What happens when the elevator again stops? Explain your observations carefully using the second law of motion.
MEDIUM
Diploma
IMPORTANT
A massless string has the same tension throughout its length. Suggest why.
MEDIUM
Diploma
IMPORTANT
A mass of 3.0 kg is acted upon by three forces of 4.0 N 6.0 N and 9.0 N and is in equilibrium. Convince yourself that these forces can indeed be in equilibrium. The 9.0 N force is suddenly removed. Determine the acceleration of the mass.
 
EASY
Diploma
IMPORTANT
A horizontal force of 24 N pulls a body a distance of 5.0 m along its direction. Calculate the work done by the force.
EASY
Diploma
IMPORTANT
A block slides along a rough table and is brought to rest after travelling a distance of 2.4 m. A force of 3.2 N opposes the motion. Calculate the work done by the opposing force.