Force and Motion

Samacheer Book Back Questions And Answers For Science Standard 6 Term 1 “Force and Motion“

I. Choose the Correct Answer:
1. Unit of speed is
a. m
b. s
c. kg
d. m/s

2. Oscillatory motion among the following is
(a) Rotation of the earth about its axis
(b) Revolution of the moon about the earth
(c) To and fro movement of a vibrating string
(d) All of these

3. The correct relation among the following is
a. speed = distance × time
b. Speed = distance / time
c. speed = time / distance
d. Speed = 1 / (distance × time)

4. Gita rides with her father’s bike to her uncle’s house which is 40 km away from her home. She takes 40 minutes to reach there.
Statement 1: She travels with a speed of 1 km/minute.
Statement 2: She travels with a speed of 1 km/hour
(a) Statement 1 alone is correct.
(b) Statement 2 alone is correct.
(c) Both Statement 1 and 2 are correct.
(d) Neither statement 1 nor statement 2 is correct.

II. Find whether the following statements are true or false. – if false give the correct Answer:
1. To and fro motion is called oscillatory motion.
2. Vibratory motion and rotatory motion are periodic motions.
3. Vehicles moving with varying speeds are said to be in uniform motion.
4. Robots will replace human in future.

Answers:
1. True
2. True
3. False (Varying speeds – Non uniform)
4. False (Robots can’t be replaced completely)

III. Fill in the blanks:
1. A bike moving on a straight road is an example of _____ motion.
2. Gravitational force is a _____ force.
3. Motion of a potter’s wheel is an example of _____ motion.
4. When an object covers equal distances in equal interval of time, it is said to be in _____ motion.

Answers:
1. Linear
2. Non-contact
3. Rotatory
4. Uniform

IV. Match the following:

Answers:
1. C
2. D
3. B
4. A
5. E

V. Analogy:
1. Kicking a ball: contact force: falling of leaf: _____
2. Distance: metre: Speed: _____
3. Circulatory motion: a spinning top: oscillatory motion: _____

Answers:
1. Non-contact forces
2. m/s
3. Pendulum

VIII. Give one word for the following statements:
1. The force which acts on an object without Physical contact with it.
2. A change in the position of an object with time.
3. The motion which repeats itself after a fixed interval of time.
4. The motion of an object travels equal distances in equal intervals of time.
5. A machine capable of carrying out a complex series of actions automatically.

Answers:
1. Non-contact force.
2. Motion.
3. Oscillatory motion.
4. Uniform motion.
5. Robots.

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