SINDH MDCAT 2014 PAPER SINDH MDCAT 2014( PART 3 ) 1. The scalar product of (2i -j + 3k). (3i + 2j – k) is: 2 10 1 25 20 2. A rock is thrown straight upward from the edge of a 30 m cliff, rising 10 m then falling all the way down to the base of the cliff. Find the rock’s displacement. 40 meters upward 50 meters upward 60 meters upward 20 meters downward 30 meters downward 3. A stone dropped from a certain height can reach the ground in 5 s. It is stopped after 3 seconds of its fall and then allowed to fall again. Find the time taken by the stone to reach the ground for the remaining distance. 2s 8s 6s 10s 4s 4. A moon of mass ‘m’ orbits a planet of mass 100 m. Let the strength of the gravitational force exerted by the planet on the moon be denoted by F1 and let the strength of the gravitational force exerted by the moon on the planet he F2. Which of the following is true F1 is ten times greater than F F1 is ten times smaller than F2 F2 is ten times greater than F1 F1 is equal to F2 F2 is ten times smaller than F1 5. Which one of the following statements is true concerning the motion of an ideal projectile launched at an angle of 45° to the horizontal The horizontal speed decreases on the way up and also decreases on the way down The speed at the top of the trajectory is zero The vertical speed decreases on the way up and increases on the way down The object’s total speed remains constant during the entire flight The acceleration rector points opposite to the velocity vector on the way up and in the same direction as the velocity vector on the way down 6. A football, at rest on the ground, is kicked with an initial velocity of 10 m/s at a launch angle of 30°. Calculate its total flight time, assuming that air resistance is negligible 2 s 0.5 s 1.7 s 1 s 14 s 7. If the diameter of the earth becomes two times its present value and its mass remains unchanged, then how would the weight of an object on the surface of the earth be affected Becomes double Becomes one third Becomes one fourth Become. half Remains same 8. A body having translatory motion possesses _____ and _____ . In the same way, a body having rotatory motion possesses _____ and _____. Linear velocity ___ linear momentum ___ angular velocity ___ angular momentum Angular velocity ___ linear velocity ___ angular momentum ___ linear momentum Linear momentum ___ angular velocity ___ angular momentum ___ linear velocity Angular momentum ___ angular velocity ___ linear momentum ___ linear velocity 9. When a body moves in the direction of gravitational force i.e. towards the earth, the work is done by the force of gravity on the body and is _____ whereas when the body moves against the direction of gravitational force, the corresponding work done is _____. Negative _____ Negative Insufficient information Negative _____ Positive Positive _____ Negative Positive _____ Positive 10. A man pushes a box, initially at rest towards another man by exerting a constant horizontal force F of magnitude 5N through a distance of I m. Its final kinetic energy is: 20 J 15 J 5 J 10 J 25 J Loading … Pages: 1 2 3 4 5
