MDCAT Physics Chapter 1 Force and motion Online Test With Answers

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MDCAT Physics Chapter 1 Force and motion Online Test

Sr. # Questions Answers Choice
1 If velocity time graph is a straight line parallel to time axis then body is Moving with zero acceleration Moving with constant velocity Covering equal displacement in equal intervals of time All of these
2 At the highest point on the trajectory of a projectile, its Potential energy is minimum Kinetic energy is maximum Total energy is maximum Kinetic energy is minimum
3 Two bodies are projected at angles  and (90°–) with the horizontal at the same speed.The ratio of their maximum heights is 1 : 1 1 : tan  1 : tan  tan<sup>2</sup> : 1
4 Speedometer of an automobile measures Average velocity Instantaneous velocity Acceleration Instantaneous speed
5 If a body changes its momentum from 100 N s to 200 N s in 10 s then the unbalanceexternal force responsible to change the momentum is 5 N 2.5 N 2n 10n
6 Swimming is possible on account of 1<sup>st</sup> law of motion 2<sup>nd</sup> law of motion 3<sup>rd</sup> law of motion Newton’s law of Gravitation
7 The angle of projection, at which the range of projectile would become half of its maximum value. 45Degree 30Degree 15Degree 60 Degree
8 . Time rate of change of momentum is equal to Force Impulse Velocity Both A and C
9 select Which one of the following is not performing projectile motion A gas filled balloon ) Bullet fired from gun A football kicked A baseball shot
10 A rider uses Motorcycle safety helmet that extends the time of collision during accident hence decreasing the Change of collisio Force acting Velocity Impulse
11 A boy is travelling from Lahore to Karachi with uniform velocity . Its Speed changes Acceleration changes Direction of motion changes Displacement from origin changes
12 A man has weight 980 N in a stationary lift. What will be his weight if the lift starts moving up with anacceleration of 4.9 ms-2 980 N 1470 N 1980 N 1460 N
13 A monkey is accelerating down a string whose breaking strength is two third of his weight. The minimumacceleration of the monkey should be 1/3g g 2/3 g 0 m/s2
14 Two astronauts in a satellite must have Same masses Same real weights Same apparent weights None of these
15 The angular momentum of a body changes from 30 J-S to 50 J-S in 0.5 sec. The torque acting on it is 40 N-m 100 N-m 50 N-m 150 N-m
16 As in linear motion force determines linear acceleration where as in circular motion torque determines its Angular acceleration Linear acceleration Vibratory acceleration Tangential acceleration
17 A body is in translational equilibrium if P = 0 L = 0 F = 0  = 0
18 The centre of gravity of a triangular plate is at On end of the plate The midpoint of any side of the plate The midpoint of any side of the plate The midpoint of any side of the plate
19 Two railway trucks of masses m and 3m move towards each other in opposite directions with speeds 2v and v respectively. These trucks collide and stick together. What is the speed of the trucks after the collision? <i>v/4</i> <i>v/2</i> <i>v</i> <i>5v/4</i>
20 The rate of change of momentum of a body falling freely under gravity is equal to its Impulse Kinetic energy Pover Weight
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