Olympiad – Class IX – Science - Phy - Motion

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Question - 1

The length of a minute hand of a clock is 4 cm. Find the displacement and the average velocity of the tip of the minute hand when it moves from 3.15 p.m. to 3.30 p.m.

  • A 4\(\sqrt 2\) cm, \(\frac {\sqrt 2}{225}\) cm-1
  • B 4\(\sqrt 2\) cm, \(\frac {4}{225}\) cm
  • C 2\(\sqrt 4\) cm, \(\frac {1}{225}\) cm s-1
  • D 4\(\sqrt 2\) cm, \(\frac {2}{225}\) cm s-1

Question - 2

A particle is travelling with a constant speed. What does this mean

  • A The position of the particle remains constant as time passes
  • B The particle covers equal distances in equal time intervals
  • C The acceleration of the particle is zero
  • D The particle does not change its direction of motion.

Question - 3

A particle shows a value of 46.0 m S-l  What can it be?

  • A Force of the particle
  • B Velocity of the particle
  • C Acceleration of the particle
  • D Momentum of the particle

Question - 4

The positions of a particle moving along a straight line are Xl = 50 m at 10.30 a.m. and x2 = 55 m at 10.35 a.m. respectively. What is the displacement of the particle
between 10.30 a.m. and 10.35 a.m.?

  • A 2 m 
  • B 5 m
  • C 7 m
  • D 9 m

Question - 5

A car covers 30 km at a uniform speed of 60 km h-1and the next 30 km at a uniform speed of 40 km h-1 Find the total time taken.

  • A 30 min 
  • B 45 min
  • C 75 min
  • D 120 min

Question - 6

A particle moving with an initial velocity of 5 m S-l is subjected to a uniform acceleration of - 2.5 m S-2. Find the displacement in the next 4 seconds.

  • A 40 m
  • B 0 m
  • C 20 m
  • D 60 m

Question - 7

An insect moves along a circular path of radius 10 cm with a constant speed. If it takes 1 minute to move from a point on the path to the diametrically opposite point, then what is the distance it travels
and average velocity of the insect respectively?

  • A 3.14 cm(min)-1,20cm(min)-1
  • B 3.14 cm(min)-1,0.33cm s-1
  • C 0.314 cm(min)-1,1 cm(min)-1
  • D 314 cm(min)-1,0.1 cm(min)-1

Question - 8

If the distance travelled by a body in the nth second is given by (4 + 6 n) m, then find the initial velocity and acceleration  of the body respectively.

  • A 3 m s-1 6 m S-2
  • B 7m s -1 4 m S-2
  • C 7 m s -1 6 m S-2
  • D 7 m s -1 3 m S-2

Question - 9

A car moving on a road with uniform acceleration covers 20 m in the first second and 30 m in the next second.

What is its acceleration?

  • A 20 m S-2
  • B 10 m S-2
  • C 30 m S-2
  • D 5 m S -2

Question - 10

The velocity of a body is given by the equation v = 6 - 0.02 t, where t is the time taken. What does the body undergo?

  • A Uniform retardation of 0.02 m S-2
  • B Uniform acceleration of 0.02 m S-2
  • C Uniform retardation of - 0.04 m S-2
  • D Uniform acceleration of - 0.04 m S-2