1. A car travels for 30,0 minutes in a straight line for a distance of 50.0 km. What is the average speed of the car (A) 1.67 km/hr; (B) 100.0 km/hir; (C) 150.0 km/hr; (D) 25.0 km/hr. (B) 250.0 km/hr.
2.
Calculate the apparent weight of a body of mass 80.0 kg inside a lift accelerating vertically upwards at the rate
m/s, where g = 10.0 m/s?. (A) 960 N; (B) 750 N (C) 820 N; (D) 480N (E) 800 N
3.
A wooden block of mass 8.0 kg rests on a surface and the coefficient of friction is 0.32. Calculate the force just
sufficient to move the block horizontally from rest. (g = 10,0 m/s?). (A) 30.2 N; (B) 25.6 N; (C) 20.8 N; (D) 510
(E) None of the above
4.
Work is said to be done when (A) force moves a body through a distance; (B) a body is not displaced: (C)
applied; (D) none of the above (E) All of the above
5. Power relates to Work done as (A) amount of work performed; (B) force associated with work; (C) work done
power. (D) Rate at which work is done; (E) Ability to do work
6.
Which of the following is not correct? (A) The work done on a particle around any closed path of a conservatis
force is zero; (B) The work done hy the resultant force acting on a particle is slightly less than the change in the
kinetic energy (C) Mechanical en y of a system is not constant but changes by the amount of work done by th
nonconservative force; (D) Energy can be transformed into mass and mass can likewise betratsiormed into ene
(E) None of the above
chr or these is incorrect? (A) Collision in which the final particles are not identical to the initial is called
scattering: (B) Two particles must not be physically in contact during collision; (C) In elastic collision, kinetic
and energy as a result of ch​