Question 8 :
What is the value of resultant force acting on an equilibrium body?
Question 16 :
What is the expression for kinetic energy and potential energy respectively?
Question 20 :
What should be the value of algebraic sum of moment of all forces of a body about the point of Rotation?
Question 26 :
When a force acts on a stationary rigid body which is free to move, moves in a straight line is called_____________
Question 27 :
Rotation around a fixed axis is a special case of ________ motion
Question 31 :
Work done by the force of gravity is same whether the body comes down from a certain height using stairs or slope or a lift. Is the statement true or false?
Question 32 :
A boy of 50 kg climbs up the stairs and reaches the roof at ta height 8m in 10s . Calculate the power spent by the boy.
Question 34 :
How much work is needed to be done on a ball of mass 50 g to give it a momentum {tex}5 kg m s^{-1}{/tex}?
Question 35 :
How many types of motion can you observe when a rigid body acted upon by a force?
Question 36 :
A body is acted upon by two unequal forces in opposite direction, but not in same line. The effect is that
Question 37 :
The correct relationship between mechanical advantage (M.A) the velocity ratio (V.R) and the efficiency ({tex}\eta{/tex})
Question 40 :
A woman draws water from a well using a fixed pulley. The mas of the bucket and water together is 6 kg. The Force applied by the woman is 670 n. Calculate the mechanical advantage.
Question 41 :
When the displacement along the same direction of the force. Then the work is said to be__________
Question 43 : A wheel of diameter 2 m. a force F=3 N is applied as shown the figure. Find the moment of force at the centre ‘O’?<img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/ICSE%20-%20Class%2010%20/5ef1c85493cf806c4d41c051"/>
Question 49 :
The velocity ratio of a combination of n moveable pulleys with a fixed pulley is always {tex}2^n{/tex}. Is it true or false?
Question 53 :
A nut ids opened by a wrench of length of 10 cm. If the least force is required 10 N. Find the moment of force needed to turn the nut?
Question 55 :
The moment of force is a scalar quantity. Is it true or false?
Question 57 :
The lever for which the mechanical advantage is less than 1 has the
Question 58 :
If kinetic energy of a body is 20 J, mass of the body is 10 kg. Then find the momentum of the body?
Question 59 :
What amount of work is done by a centripetal force in a circular motion?
Question 62 :
A body of mass 10 kg is taken from a height 10 m to 20 m. Find the increase in potential energy. (g=10 {tex}m/s^2{/tex})
Question 64 :
When the displacement along the opposite direction of the force. Then the work is said to be__________
Question 65 :
When we want to use a machine as a speed multiplier then,
Question 66 :
A rotation is produced by couple. Is it true or false?
Question 67 :
The turning effect on the body about an axis due to_______ applied on the body.
Question 69 :
The correct relationship between the velocity ratio (V.R) the distance through which effort act (d) and the distance through which load moves (D)
Question 72 :
The SI unit of power is watt. It is expressed in terms of mass, length and time as:
Question 73 :
A body is acted upon by two unequal forces in opposite directions, but not in same line. The effect is that
Question 75 :
The point of action of force on a rigid body is :
Question 76 :
Kilocalorie is the amount of heat required to raise the temperature of:
Question 77 :
The correct relationship between the mechanical advantage (M.A.), velocity ratio (V.R.) and efficiency (n) is:
Question 78 :
A lever which can have mechanical advantage either less than one or more than one depending upon the position of fulcrum is a lever of :
Question 79 :
Which of the following quantity remains constant in uniform circular motion:
Question 82 :
A pendulum is oscillating on either side of its rest position. The correct statement is :
Question 87 :
Which of the statement is not true for an actual machine?
Question 88 :
A pair of scissors is used to cut a piece of a cloth by keeping it at a distance 8.0 cm from its rivet and applying an effort of 10 kgf by fingers at a distance 2.0 cm from the rivet. Find the load offered by the cloth.
Question 90 :
When we want to use a machine as a force multiplier then,
Question 92 :
Which of the statement is not true for a machine ?
Question 93 :
A beam of electrons has an energy of 1 joule. How many electrons are in the beam ? [1 eV = 1.6 x 10$^{-19}$]
Question 95 :
The lever for which the mechanical advantage is less than 1 has the :
Question 96 :
A boy drags a load ‘L’ along horizontal plane AB by applying a force F. The boy does
Question 97 :
In an electric cell while in use, the change in energy is from:
Question 98 :
A nut which can be broken by applying a force of 40 Kgf , is broken by using a nut cracker having its handle 20 cm long, by placing it at a distance 2 cm from the hinge. Calculate the minimum force needed to break the nut?
Question 99 :
A force F acts on a rigid body capable of turning around a fixed point. The moment of force depends upon
Question 100 :
A single fixed pulley and a movable pulley both are separately used to lift a load of 50 kgf to the same height. Compare the efforts applied.
Question 102 :
A person standing vertically upon his toes is an example of lever of :
Question 104 :
The turning effect produced in a rigid body around a fixed point by the application of force is called;
Question 106 :
How can the direction of rotation of a body be changed?
Question 108 :
The actual mechanical advantage of a single movable pulley is :
Question 109 :
A pulley system with velocity ratio 4 is used to lift a load of 150 kgf through a vertical height of 20 m. The effort required is 50 Kgf in the downward direction. Calculate the distance move by effort.
Question 110 :
A lever which always has mechanical advantage less than 1 has :
Question 112 :
The centre of gravity of a hollow cone of height h is at distance x from its vertex where the value of x is:
Question 114 :
An actual pulley system always has mechanical advantage less than velocity ratio. It is because :
Question 117 :
A lever which always have mechanical advantage more than 1 is :
Question 118 :
The unit of moment of force in SI system is :
