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Mdcat-past-papers Quiz

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901. A fisherman lifts a fish of mass 250g from rest through a vertical height of 1.8m. The fish gains a speed of 1.1 m/s. What is the energy gained by the fish?



902. Two bodies of masses 10kg and 40kg are dropped from the same height at the same time. Value of which of the following remains the same during the motion of the two bodies?



903. The absolute potential energy of a spaceship on the surface of the earth is:



904. A 1.75cm height weight-lifter raises weights with a mass of 50kg to a height of 0.5m above his head. How much work is being done by him? (g = 10 m/s²)



905. A block of mass 20g is thrown vertically upward with a speed of 10 m/s. The work done by the force of gravity during its upward motion is:



906. The area under force-displacement graph gives us



907. If by some phenomenon the Earth contracts to one half of its present size, then gravitational potential energy becomes:



908. The product of force and velocity is:



909. The amount of work done in moving a body at certain point in a gravitational field to a position of zero potential such that the body is never accelerated is called:



910. The absolute potential energy is given as Ug = –GmMₑ/R. The negative sign indicates that Earth's gravitational field for mass "m" is:



911. An automobile is moving forward with uniform velocity due to force exerted by its engine. If that force is doubled with velocity remaining constant, what happens to total power?



912. The consumption of energy by a 60W bulb in 2s is:



913. An electric motor is used to lift the weight of 2.0N through a vertical distance of 100cm in 4 sec. What is the power output of the motor?



914. The rate of doing work is zero, when the angle θ between force and velocity is:



915. 1 J/s is equal to:



916. The unit of power in British engineering system is:



917. A motor boat is moving with velocity 4 m/s. The net force acting on it is 1000 N. What will be the power of engine of boat?



918. Power is dot product of:



919. Electricity consumption is calculated commercially in:



920. Find Power, If m=200Kg, h = 200m, t =10s and g=10ms⁻².