28/03/2020 Kinematics – Linear and Non-Linear Motion, Projectiles(Senior Class Physics Study by Topics) 28/03/2020 0Comments by Gate Academy Welcome to your Kinematics - Linear and Non-Linear Motion, Projectiles(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. A body starts from rest and moves in a straight path with uniform acceleration of 8m/s² for 5 seconds. It then decelerates uniformly to rest in the next 10 seconds. Calculate the magnitude of its acceleration. 16m/s² 8m/s² 4m/s² 3m/s² 80m/s² 2. An apple fruit is dropped to the ground from the top a tree 45m tall. How long does it take to reach the ground? (Take g = 10m/s²) 7.5s 6s 4.5s 3s 9s 3. A ball is dropped from a height of 20m and rebounds with a velocity which is 3/4 of the velocity with which it hits the ground. What is the time interval between the first and the second bounces? 6.0s 3.0s 0.5s 2.0s 1.5s 4. A motor vehicle is brought to rest from a speed of 15m/s in 20s.Calculate the retardation 0.75m/s² 7.5m/s² 1.33m/s² 5.0m/s² 5. A boy moving with a velocity of 4m/s is brought to rest by a constant force after traveling 20m.Calculate the retardation. 0.1m/s² 0.2m/s² 5.0m/s² 2.5m/s² 0.4m/s² 6. A body falls from rest to the ground in 0.5s.Calculate the height from which it falls.(g = 10m/s²) 1.0m 1.25m 0.125m 5m 0.5m 7. The driver in a car of which the total mass is 800kg and which is traveling at 20m/s, suddenly observes a stationary cat in his path 50m ahead.If the car brakes exert a force of 2KN, what will most likely happen? the car will stop 30m after hitting the cat the driver will quickly reverse the car the car will stop 20m in front of the cat the cat will stop 5m beyond the cat the car will be able to stop immediately the driver notices the cat 8. A stone and a feather are dropped from the same height above the earth surface. Ignoring air resistance, which of the following is correct? the feather will reach the ground first the stone will reach the ground first the feather will be blown away by the wind while the stone will drop steadily the stone and feather will both reach the ground at the same time 9. The distance moved by a particle in the sixth and eight seconds of the motion are 45m and 53m respectively.Determine the acceleration and initial speed. 10m/s² and 46m/s 5.4m/s² and 12m/s 7m/s² and 36m/s 4m/s² and 23m/s 10. A train with an initial velocity of 20m/s is subjected to a uniform deceleration of 2m/s². The time required to bring the train to a complete halt is 5s 20s 40s 10s 11. A stone was dropped from a height, h and attained a velocity of 20m/s just before hitting the ground. If g = 10m/s², calculate the height, h through which it fell.. 200m 20m 10m 100m 12. A ball is thrown vertically upwards and returns to the thrower after 6s.Calculate the maximum height attained.(Take g = 10m/s²) 150m 180m 135m 45m 90m 13. A car moves with an initial velocity of 25m/s and reaches a velocity of 45m/s in 10s. What is the acceleration of the car? 2m/s² 5m/s² 25m/s² 20m/s² 14. If a car starts from rest and moves with a uniform acceleration of 10m/s² for 10s. The distance it covers in the last one second of its motion is 100m 95m 905m 1000m 500m 15. From the top of the Eiffel tower, a rubber ball and a piece of iron rod were dropped to the ground. Which of the following is true? (neglect air resistance) both objects will reach the ground at the same time the rubber ball will first reach the ground under high temperature condition, the iron rod will first reach the ground the iron rod will first reach the ground 16. When a ball rolls on a smooth level ground, the motion of its center is random oscillatory rotational translational 17. A moving object has a uniform acceleration. Its velocity varies inversely with time velocity increases by equal amounts in equal time displacement increases at a constant rate speed is directly proportional to time 18. The distance traveled by a particle starting from rest is plotted against the square of the time elapsed from the commencement of motion.The resultant graph is linear.The slope/gradient of this graph is a measure of initial velocity half the initial diaplacement half the acceleration twice the acceleration initial displacement 19. A body travels from rest and accelerates uniformly to a speed of 120km/hr in 10 seconds. What is the distance covered? 1000km 600km 6km 60km 1/6km 20. A particle is projected vertically upwards with a velocity of 20m/s.What maximum height does it attain? (g = 10m/s²) 2m 200m 2000m 0.2m 20m 21. The motion of a moving skin of a talking drum can rightly be described as oscillatory transitory translational rotational random 22. If it takes an object 3s to fall freely to the ground from a certain height, what is the distance covered by the object? 90m 45m 30m 60m 23. A body starts from rest and moves with uniform acceleration of 6m/s².What distance does it cover in the third second ? 27m 30m 35m 18m 15m 24. Which of the following types of motion are oscillatory?I. a diving board when used by a diverII. the motion of the balance wheel of a wrist watchIII. the motion of turn-table of a record playerIV. the motion of the center of a coin as it rolls down on an inclined planeV. the motion of a needle of a d.c ammeter into which a low a.c current is passed. III, IV & V only I & II only I, II & V only II, III & IV only I, II & III only 25. A bullet fired vertically upward from a gun held 2m above the ground reaches its maximum height in 4s.Calculate its initial velocity. (g = 10m/s²) 10m/s 40m/s 8m/s 20m/s 2m/s 1 out of 25 Time is Up! Time's up