PPSC Lecturer of Physics Online Test 46 Solved MCQs

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There will be 25 multiple choice question in the test.
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 Test Instructions:- Test Name Lecturer PhysicsÂ Subject Physics Test 46 Test Type MCQs Total Questions 25 Total Time 20 Minutes Total Marks 100
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You have 20 minutes to pass to the quiz.

PPSC LECTURER OF PHYSICS TEST NO. 46

1 / 25

Velocity is defined as:

2 / 25

A plane traveling north at 200m/s turns and then travels south at 200m/s. The change in its velocity is:

3 / 25

A particle goes from x = âˆ’2m, y = 3m, z = 1m to x = 3m, y = âˆ’1m, z = 4 m. Its displacement is:

4 / 25

Which of the following is NOT an example of accelerated motion?

5 / 25

A bomber flying in level flight with constant velocity releases a bomb before it is over the target. Neglecting air resistance, which one of the following is NOT true?

6 / 25

Acceleration is defined as:

7 / 25

A stone is tied to a string and whirled at constant speed in a horizontal circle. The speed is then doubled without changing the length of the string. Afterward the magnitude of the acceleration of the stone is:

8 / 25

Two bodies are falling with negligible air resistance, side by side, above a horizontal plane. If one of the bodies is given an additional horizontal acceleration during its descent, it:

9 / 25

Two vectors have magnitudes of 10m and 15 m. The angle between them when they are drawn with their tails at the same point is 65â—¦. The component of the longer vector along the line perpendicular to the shorter vector, in the plane of the vectors, is:

10 / 25

An object is shot from the back of a railroad flatcar moving at 40km/h on a straight horizontal road. The launcher is aimed upward, perpendicular to the bed of the flatcar. The object falls:

11 / 25

A jet plane in straight horizontal flight passes over your head. When it is directly above you, the sound seems to come from a point behind the plane in a direction 30â—¦ from the vertical. The speed of the plane is:

12 / 25

The velocity of a projectile equals its initial velocity added to:

13 / 25

A large cannon is fired from ground level over level ground at an angle of 30â—¦ above the horizontal. The muzzle speed is 980m/s. Neglecting air resistance, the projectile will travel what horizontal distance before striking the ground?

14 / 25

A projectile is fired from ground level over level ground with an initial velocity that has a vertical component of 20m/s and a horizontal component of 30m/s. Using g = 10m/s2, the distance from launching to landing points is:

15 / 25

Two objects are traveling around different circular orbits with constant speed. They both have the same acceleration but object A is traveling twice as fast as object B. The orbit radius for object A is the....................... orbit radius for object B.

16 / 25

Which of the following is a vector quantity?

17 / 25

Which of the following is a scalar quantity?

18 / 25

An airplane is flying north at 500 km/h. It makes a gradual 180â—¦ turn at constant speed, changing its direction of travel from north through east to south. The process takes 40 s. The average acceleration of the plane for this turn (in km/hÂ·s) is:

19 / 25

A stone thrown from the top of a tall building follows a path that is:

20 / 25

An airplane makes a gradual 90â—¦ turn while flying at a constant speed of 200m/s. The process takes 20.0 seconds to complete. For this turn the magnitude of the average acceleration of the plane is:

21 / 25

Identical guns fire identical bullets horizontally at the same speed from the same height above level planes, one on the Earth and one on the Moon. Which of the following three statements is/are true?

I. The horizontal distance traveled by the bullet is greater for the Moon.
II. The flight time is less for the bullet on the Earth.
III. The velocity of the bullets at impact are the same.

22 / 25

Two vectors lie with their tails at the same point. When the angle between them is increased by 20â—¦ the magnitude of their vector product doubles. The original angle between them was about:

23 / 25

A bullet shot horizontally from a gun:

24 / 25

A stone is thrown outward from the top of a 59.4-m high cliff with an upward velocity component of 19.5m/s. How long is stone in the air?

25 / 25

A particle moves at constant speed in a circular path. The instantaneous velocity and instantaneous
Â acceleration vectors are: