Question

Assertion (A) : No work is done by gravitational force if a body moves along a horizontal surface.
Reason (R) : In horizontal motion, angle between gravity and displacement is 900.

A
Both (A) and (R) are true and (R) is the correct explanation of (A)
B
Both (A) and (R) are true and (R) is not the correct explanation of (A)
C
(A) is true and (R) is false
D
(A) is false and (R) is true
Solution
Verified by Toppr

mg.ds cos900=0

Was this answer helpful?
0
Similar Questions
Q1

Assertion (A): Sodium metal is stored in kerosene

Reason (R): The density of sodium is less than water


View Solution
Q2

Assertion (A) : A man standing on a completely frictionless surface can propel himself by whistling.
Reason (R) : If no external force acts on a system, its momentum cannot change. Codes

View Solution
Q3

Assertion (A): Solvay process is used for the preparation of NaHCO3 but not for KHCO3

Reason (R): Solubility of KHCO3 is more than NaHCO3 in water


View Solution
Q4

Assertion––––––––––– (A): The boiling point of HF is higher than that of H2O.
Reason–––––––– (R): The hydrogen bond strength in HF is lower than that in H2O.


View Solution
Q5

Assertion: If x≠y, then (x,y)≠(y,x)
Reason: If x=y, then (x,y)β‰ (y,x)
Which of the following is correct?


View Solution
Solve
Guides