Physics Chapter 1 Entry test MCQs
76. The ratio of displacement along diameter and total distance along circle:
a. π: 1
b. 1: π
c. π:2
d. 2: π
77. Arshad is driving down 7th street. He drives 150 meter is 18 seconds. Assume he does not speed up or slow down. What is his speed?
a. 126m/s
b. 0.38m/s
c. 58.33m/s
d. 8.33m/s
78. The distance travelled by a moving car with velocity 15 m/s in 2 seconds, decelerates at 2m / s² is equal to
a. 34m
b. 30m
c. 26m
d. 16m
79. The value of ratio of displacement to distance is:
a. Always less than one
b. Always one
c. Equal or less than one
d. More than one
81. The numerical ratio of displacement to distance is:
a. Always more than one
b. Always less than one
c. Equal to or less than one
d. Always equal to one
82. A bullet of mass m moving with a velocity v is fired into large wooden block of mass M of the bullet remains embedded in the wooden block, the velocity of the system will be:
a. M/(M – m)V
b. M/(M + m)V
c. m/(M – m)V
d. m/(M + m)V
83. If velocity time graph is not constant at different points, then body is moving with
a. Increasing acceleration
b. Uniform velocity
c. Constant acceleration
d. Average acceleration
84. A cyclist is traveling at 15ms-1 she applies brakes so that she doesn’t collide with the wall in front of her distance of 18m. Calculate the magnitude of deceleration.
a. 5.3ms-1
b. 6.3ms-1
c. 12.5ms-1
d. 13ms-1
85. Newton first law of motion is also known is
a. Law of electromagnetism
b. Law of inertia
c. Law of conservation
d. Law of universal gravity
86. If two objects of equal masses ‘m’ are moving towards each other with the same speeds ‘v’ then what will be the total final momentum after elastic head-on collision?
a. mv kg m/s
b. -mv kg/s
c. 0 kg m/s
d. 2 mv kg/s
87. For projectile motion in the absence of air resistance:
a. horizontal force is constant
b. vertical speed is constant
c. vertical acceleration is zero
d. horizontal acceleration is zero
88. The range of the projectile depends upon the velocity of the projection and the angle of the projection i.e 45°. For a fixed velocity, when the angle of projection is larger than 45°. Which of the following is correct?
a. both the height and the range attained by the projectile will be more
b. both the height and the range attained by the projectile will be less
c. The height attained by the projectile will be more but the range is less
d. The height attained by the projectile will be less but the range is more
89. The slop of distance – time graph will always be:
a. Zero
b. Negative
c. Maximum
d. Positive
90. At what angle of projection of a projectile the range becomes half of its maximum value?
a. 30°
b. 15°
c. 40°
d. 20°
91. If we drop an object, its initial velocity is zero. How far will it fall in time ‘t’?
a. 0.49t²
b. 9.8t²
c. 98t²
d. 4.9t²
92. The newton-second is unit of:
a. Impulse
b. Work
c. Momentum
d. Power
93. Which one of the following is the angle of projection of a projectile if its range is equal to its height?
a. 90°
b. 48°
c. 76°
d. 60°
94. The product of force and time is equal to:
a. Change in momentum
b. Change in momentum
c. Velocity
d. Force
95. At what angle of projection of a projectile the range becomes half of its maximum value.
a. 20°
b. 15°
c. 40°
d. 20°
96. Vertical velocity vs time graph for a projectile motion
a. Is constant
b. Varies linearly
c. Is linear
d. Follow a parabolic path
97. The magnitude of displacement is
a. Size of object B
b. Size of object A
c. Any distance between initial and final position
d. Straight line distance between initial and final position
98. If the displacement -15m and time -10seconds the average velocity is
a. 2.5m/s
b. 12.5m/s
c. 3m/s
d. 1.5 m/s
99. Decrease in velocity per unit time is called
a. Positive acceleration
b. Acceleration
c. Uniform acceleration
d. Deceleration
100.The slope of velocity-time graph represents
a. Force
b. Displacement
c. Momentum
d. Acceleration
101. An object is accelerating
a. When its speed or direction changes
b. Only when its speed changes
c. If its velocity is large
d. Only when its direction changes
102. What is the slope of a straight-line graph of position vs. time?
a. Distance
b. Velocity
c. Acceleration
d. Displacement
103. The coefficient of restitution for a perfectly elastic collision is
a. Infinity
b. 1
c. -1
d. 0
104. What is the accelerating force on the Diwali rocket if it ejects 0.05 kg of gases per second at a velocity of 400 m/s?
a. 1000 N
b. 20 N
c. 22 dynes
d. 20 dynes
105. If mass is 2 kg and velocity is 35 m/s, then momentum is
a. 17.5 kg m/s
b. 70 kg m/s
c. 105 kg m/s
d. 90 kg m/s
106. If Velocity time graph shape is parallel to Y-axis the acceleration
a. Infinity
b. Maximum
c. Minimum
d. 0