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TEJAS ACADEMY OF SCIENCE, , Physics, , , , Time : 1.00 hr x! Marks : 20, , , , , , Projectile Motion(11th), , 1) A bus travels its onward journey with a constant speed of 30 km/hr while its return journey with, constant speed of 60 km/hr the average speed of entire journey ts :, , A) 90 km/hr B) 60 km/hr C) 45 km/hr D) 30 km/hr, , 2) Aparticle oscillates along a straight line Im long. If It completes one oscillation In 0.1 second then, distance covered by it and average speed during its one oscillation is :, , A) 1m, 20 mis B) 2m, 10 m/s C) 2m, 20 mis D) 4m,40 ms, , 3) The position of object moving along x-axis is given by x = a+ bt” where a = 8.5 mand b = 2.5m/s”, velocity of object at the end of 2 secon, , A) 18.5 mis B) 10 mis C) 9.25 mis D) 1.5 mis, , 4) Aman walks 240 m in 30 second and then walks back 140 m towards starting point in next 35 second., What will be average velocity ?, , A) 4.3 mis B) 1.54 m’s C) 1.2 mis D) 0.8 mis, , 5) Two passenger trains are passing each other on adjacent tracks. Train "A" is travelling east with 13, m/s and train "B" is travelling west with a speed of 28 m/s. Velocity of train A" as seen by the, passenger In train "B" Is :, , A) 13 mis B) 15 mis C) 28 mis D) 41 my, , 6) A-stream flows at the rate of 20 m/s at a given time a boat travel downstream three times the distance, travelled by it in upstream. Then speed of boat in still water is:, , A) 10 mis B) 20 m’s C) 30 mis D) 40 mis, , 7) Two trains A and B 125 m and 100 m long are moving in opposite directions on parallel tracks. The, speed of train B Is three times that of train A. The train takes 4 s to pass each other then speed of each, train as:, , A) 41.3 mis , 100 ms B) 10 ms , 30 mis, C) 14.1 mis , 42.3 mis D) 25 mis, 75 m/s, , 8) Velocity of body changes from 18 km/hr to 90 km/hr In 10 second, then acceleration of body Is:, A) zero B) 2m/s* C) 4m/s? D) 6m/s?, , 9) A body starts from rest accelerates uniformly to attain a velocity of 20 m/s in 30 second, then, acceleration of body Is :, , A) 3m/s* B) 2m/s® C) tims? D) 0.67m/s*

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TEJAS ACADEMY OF SCIENCE 2, , , , 10) A body moving with initial velocity 1 m/s accelerates uniformly at 0.5m,/s” then its velocity at the end, of 10 second is :, , A)2ms B) 4m/s C)éms D) 8m/s, 11) Racing car starts from rest attains 144 km/hr in 20 second, then car should have uniform acceleration :, , A) 4m/s? B) 2m/s* C) tm/s? D) zero, , 12) By seeing a child on a railway track the driver applies brakes. The speed of train is reduced from 90, km/hr to 36 km/hr in 5 s then train retards by, , A) Sms? B) Sm/s® C) -3m/s® D) -5m,'s?, , 13) A car accelerates from rest to a speed of 90 km/ hr in 25 second, distance covered by car during this, time :, A) 100m B) 200m C) 238 m D) 312.5m, , 14) A body having velocity of 5 m/s is accelerated at the rate of 2m," far 4s then distance covered by, body during this time interval :, , A) 20m B) 32m C) 36m D) 40m, , 15) A car is moving with velocity of 72 km/hr then breaks are suddenly applied and car comes to stop after, covering a distance of 50 m, then retardation produced in car is :, , A) 2m/s? B) 4in/s? C) —8m,/s? D) —4m/s?, , 16) A person travelling at 43.2 km/hr applies break going deceleration of 6m,'s* to his scooter. Distance, covered by scooter before It stops :, , A)Gm B) 12m Cc) 24m D) 30m, , 17) Particle starts from rest and moves with constant acceleration. It takes 5 second to reach a speed of, 48 km/hr. Distance covered by particle during this time is :, , A)Sm B) 10m C)12.5m D)17.5m, 18) A car al rest accelerates uniformly to a speed of 144 km/hr in 20 s. It covers distance of:, , A) 20m B) 400m C) 1440 m D) 2380 m, , 19) A car moving with uniform velocity of 40 km/hr can be stopped by applying breaks in distance of 2 m., lf the same car is moving with a speed of 80 km/hr what is the minimum stopping distance if force and, acceleration is constant ?, , Aj4m B)ém c)8m D) 16m, , 20) A body moving with an initial velocity of 1 m/s accelerates uniformly at 0.5m/s. What will be its, velocity when it has a displacement of 48 m? :, , A) ims B)émis Cc)7 ms D) 24 mis, , , , Rahul Chavan Sir 9130013007