Mechanical Advantage in Lever
Trending Questions
Q. State Newton's first law of motion.
Q. To keep a body moving with a constant velocity on a frictionless surface, the net force:
- Should be of variable magnitude
- Should act continuously
- Should be zero
- Should act opposite to direction of motion
Q.
A system of pulleys is used to lift a load of . If the efficiency of the pulley system is and velocity ratio is , find the effort required to lift the load.
Q.
A man uses a crowbar of length 1.5 m to raise a load of 75 kgf by putting a sharp edge below the bar at a distance 1 m from his hand. State the kind of lever and calculate the effort needed.
Class II lever, 35 kgf
Class I lever, 37.5 kgf
Class III lever, 37.5 kgf
Class I lever, 35 kgf
Q.
Newton's first law of motion defines force.
Q. For newton's third law, if we say “For every action there is an equal and opposite reaction”, but this statement is incomplete. What must be added to make the given statement complete ?
- Action reaction pair must be on same line
- All of the above
- Action reaction pair acts simultaneously
- Action reaction pair acts on two different bodies
Q.
What will be the mechanical advantage of a lever which helps to lift a load of 60 kgf when an effort of 20 kgf is applied?
Q. Arun is late for work; he increases his speed from 5 m/s to 20 m/s in 1.5 sec. The mass (including car and everything in it) is 2000 kg. Find out the net force acting on the car.
- 14400 N
- 20000 N
- 40000 N
- 30000 N
Q. Choose the correct option with respect to Newton's first law of motion among the following.
- An object in motion may come to rest without any external force acting on it.
- An object at rest can move without any external force acting on it.
- It is also called the law of gravitation.
- An object in uniform motion stays in uniform motion unless acted upon by an unbalanced force.
Q.
mechanical advantage is defined as
Q.
Calculate the mechanical advantage of a lever when the effort arm = and the load arm = .