Question

.1.Distance travelled by light in one year in vacuum defines *
(a) light year
(b) parsec
(c) astronomical unit
(d) angstrom
Q.2. Identify the pair of physical quantities, whose dimensions are equal *
(a) work and energy
(b) distance and displacement
(c) speed and velocity
(d) all of the above
Q.3. The acceleration of a moving body can be found from *
(a) area under velocity-time graph
(b) area under distance-time graph
(c) slope of velocity-time graph
(d) slope of distance-time graph
Q.4 Two forces of magnitude Aand B are acting at right angle to each other. The magnitude of their resultant is *
(a)A+B
(b) A - B
(c) √(A²+B²)
(d) √(A²-B²)
Q.5.A cricketer throws a ball at an angle of 30° with the horizontal having velocity 30ms⁻¹. The maximum height attained by the ball is(Take g = 10 ms⁻²) *
(a) 40 .25m
(b) 20 .50m
(c) 11.25 m
(d) 50 m​

Answer 1

Answer:

light year is the correct answer