ECAT Pre Computer Science Chapter 3 online mcq test with answers for Physics chapter 3 (Motion and Force)

ECAT Physics Chapter 3 Motion and Force Online Test

Sr. #	Questions	Answers Choice
1	The range of projectile is 50 m whenθ is inclined with horizontal at 15°. What is the range whenθ becomes 45°?	400 m 300 m 200 m 100 m
2	A projectile on its path gets divided into two pieces at its highest point. Which is true?	Momentum increases Momentum decreases Kinetic energy increases Kinetic energy decreases
3	Which of the following statements for an object in equilibrium is not true?	The object must be at rest The object can be at rest The object is moving at constant speed The acceleration of the object is zero
4	Two projectiles are fired from the same point with the same speed at angles of projection 60° and 30° respectively. Which one of the following is true?	Their range will be same Their maximum height will be same Their landing velocity will be same Their time of flight will be same
5	Maximum height of a bullet when fixed at 30 with horizontal is 11 m. Then height when it is fired at 60° is	22 m 6 m 33 m 7.8 m
6	Find the total displacement of a body in 8 seconds starting from rest with an acceleration of 20 cm/s²	0.064 m 640 cm 64 cm 64 m
7	A train is moving with a velocity of 25 m/s and a car is moving behind it by a velocity of 8 m/s in same direction. The relative velocity of train with respect to car is	17 m/s 33 m/s 17.5 m/s none
8	A body is thrown from a height h with speed u, it hits the ground with speed V	The value of V is maximum if the body is thrown vertically downward The value of V is maximum if the body is thrown vertically upwards The value of V is minimum if the body is thrown horizontally The value of V does not depend on the direction of which it is thrown
9	A ball is dropped vertically down and it takes time t to reach the ground. At time t/2	The ball had covered exactly half the distance The velocity of the ball was V/3 where V is the velocity when it reached the ground The ball had covered less than half the distance The ball had covered more than half the distance
10	A ball is dropped from a certain height and another ball is projected horizontally from the same point. Which of the following statement is correct?	Both hit the ground at the same veloctiy Both hit the ground at the same speed The change of velocity during the path for both balls is the same The change of speed during the path for both balls is the same
11	A man sitting in a bus travelling in a direction from west to east with a speed of 40 km/h observes that the rain drops are falling vertically down. To the another man standing on ground the rain will appear	To fall vertically down To fall at an angle going from west to east To fall at an angle going from east to west The information given is insufficient to decide the direction of rain
12	Range of a projectile is R, when the angle of projection is 30° . Then, the value of the other angle of projection for the same range, is	45<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 60<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 50<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 40<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>
13	If the water falls from a dam into a turbine wheel 19.6 m below, then the velocity of water at the turbine, is (Take g=9.8 m/s²)	9.8 m/s 19.6 m/s 39.2 m/s 98.0 m/s
14	If speed of electron is 5 x 10⁵m/s. How long does it take one electron to transverse 1 m?	1 x 10<sup>6</sup> 2 x 10<sup>6</sup> 2 x 10<sup>5</sup> 1 x 10<sup>5</sup>
15	Distance traveled by a body falling from rest in the first, second and third second is in the ration of	1 : 2 : 3 1 : 3 : 5 1 : 4 : 9 None of the above

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