PPSC Physics Chapter 1 MECHANICS With Answers

image
image
image

PPSC Physics Chapter 1 MECHANICS

Sr. # Questions Answers Choice
1 The are between the velocity time graph and the time axis is numerically equal to. Distance moved by the object Speed of the object Velocity of the object Acceleration of the object
2 In an accelerated or non - inertial frame of reference the weight of the body depends upon. Acceleration of the frame of reference Velocity of the body Momentum of the body Velocity of the frame of reference
3 If a body a moving with constant acceleration the velocity time graph will be a zig zag Straight line Constant value zero value
4 A man in an elevator descending with an acceleration will conclude that his weight has Increased Decreased Constant value Zero value
5 If average acceleration is equal to instantaneous acceleration then the body's said to be moving. Negative acceleration<div><br></div> Positive acceleration uniform acceleration Variable acceleration
6 If the average velocity of an object zero in some time interval, the displacement of the object for that interval will be. Infinite Zero Increasing Decreasing
7 Which of the following is not true. Velocity can be nagative Velocity is a scalar Speed is a vector Speed can be negative
8 When a force is applied on a body several effects are possible which of the following effect could not occur. The body speeds up The body changes direction The pressure on the body increases The mass of the body decreases
9 It the slope of velocity time graph is increasing with time the body is said to have. Positive acceleration Average acceleeration Uniform acceleration Retardation
10 A body at rest may have Speed Momentum Acceleration Energy
11 a 5 kg mass is falling freely the force acting on it will be. 0 N 9.8 N 5 N 19.6 N
12 a 2,000 kg heavy truck travelling at 36 km h-1 strikes a tree and comes to a stope in 0.1 s The average force on the truck during the crash is. 2 x 10<sup>2</sup> N 2 X 10<sup>3 </sup>N 2 X 10<sup>4</sup> N 2 X 10<sup>3</sup> N
13 A car is travelling on a level highway at at speed of 15 m s-1. A braking force of 3,000 N brings the car to stop in 10 s The mass of the car is. 1500 kg 2,000 kg 2,500 kg 3,000 kg
14 A body is thrown vertically upward with initial velocity 9.8 ms-1 it will reach the height. 4.9 m 19.9 m 29.4 m 49.2 m
15 Which of the following is not necessary for work to be done. A constant force An applied force A displacement Force component along the displacement
16 Which of the following will not acceleation. The moon in its orbit A tennis ball rebounding from ground A store in free fall A car in which the engine thrust is equal to the friction
17 If a vehicle is to gain momentum it must Lose weight Move slowly Lose inertia Accelerate
18 when a body accelerates. Its direction always changes Its mass always changes Its velocity always changes It falls towards the earth
19 A force of 100 N acts on body of mass 5 kg for 10 s. The velocity of the body will be. 2 ms -1 20 m s-1 200 ms-1 2.000 m s-1
20 The action and reaction forces Must act upon the same body Must act upon different bodies Must be equal in magnitude but need not have the same line of action. Different speed at the different height during ascent and during descent.
Download This Set

Is this page helpful?

×