Topic: UNIT II: Kinematics (Test 2)



Topic: UNIT II: Kinematics
Q.1
If a particle executes uniform circular motion in the xy plane in clock wise direction, then the angular velocity is in
A. +y direction
B. +z direction
C. -z direction
D. -x direction
Answer : Option C
Explaination / Solution:
No Explaination.


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Q.2
If a particle executes uniform circular motion, choose the correct statement
A. The velocity and speed are constant.
B. The acceleration and speed are constant.
C. The velocity and acceleration are constant.
D. The speed and magnitude of acceleration are constant.
Answer : Option D
Explaination / Solution:
No Explaination.


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Q.3
If an object is thrown vertically up with the initial speed u from the ground, then the time taken by the object to return back to ground is
A. u2/2g 
B. u2/g
C. u/2g
D. 2u/g
Answer : Option D
Explaination / Solution:
No Explaination.


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Q.4
Two objects are projected at angles 30° and 60° respectively with respect to the horizontal direction. The range of two objects are denoted as R30̊ and R60̊. Choose the correct relation from the following
A.

R30̊ = R60̊

B.

R30̊  =4R60̊

C. R30̊  = R60̊ /2
D. R30̊  =2 R60̊
Answer : Option A
Explaination / Solution:
No Explaination.


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Q.5
An object is dropped in an unknown planet from height 50 m, it reaches the ground in 2 s . The acceleration due to gravity in this unknown planet is
A. g = 20 m s-2 
B. g = 25 m s-2
C. g = 15 m s-2 
D. g = 30 m s-2
Answer : Option B
Explaination / Solution:
No Explaination.


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