Motion and Measurement of Distances | Chapter Assessment | English | Grade 6

When an object moves along a straight line it is said to be in ______.

• Rectilinear motion

• Circular motion

• Periodic motion

• Circular and periodic motion

Answer explanation

When an object moves along a straight line it is said to be in rectilinear motion.

If 1 km = 1000 m, then 5 km = ______ m.

• 5 m

• 500 m

• 5000 m

• none of these

Answer explanation

1 km = 1000 m 5 km = 5 x 1000 m = 5000 m

Find the odd man out with respect to periodic motion.

• Motion of blades of a fan

• Motion of swing

• Motion of pendulum of clock

• Motion of a bird flying in the sky

Answer explanation

Motion of blades of a fan, motion of swing and motion of pendulum of clock are all periodic motions. However, motion of a bird flying in the sky may not be periodic. So correct answer is option 4.

Sneha uses a broken ruler to measure the length of a rope. If one end of the rope coincide with the 4 cm mark of ruler, and other end of rope coincide with 9.2 cm mark of the ruler, then find the length of the rope.

• 5.2 cm

• 9.2 cm

• 4 cm

• 13.2 cm

Answer explanation

One end of rope coincides with 4 cm mark on ruler Other end of rope coincide with 9.2 cm mark on ruler. So the length of rope will be = 9.2 cm - 4 cm = 5.2 cm Therefore, option 1 is the correct answer.

Match the columns.

• (a) - (i) (b) - (ii) (c) - (iii)

• (a) - (i) (b) - (iii) (c) - (ii)

• (a) - (iii) (b) - (i) (c) - (ii)

• (a) - (ii) (b) - (iii) (c) - (i)

Answer explanation

In which option the correct way of measuring the length is shown?

• 
• 
• 
• 

Answer explanation

The correct way of measurement is represented by option 2. For measurement object should be placed in between the readings of the scale. In option 1, 3, and 4 object is not placed exactly between the reading of scale.