Here are 10 one-word answer type questions from the topic Motion and Time along with their answers and explanations:
Topic: Motion and Time
Motion and Time deals with the movement of objects, how fast they move (speed), how time is measured, and different types of motion like straight-line, circular, and periodic motion. It also teaches about concepts like speed calculation, time period, and distance-time graphs.
1. Question: What is the distance covered by an object in unit time called?
Answer: Speed
Explanation: Speed is the measure of how fast or slow an object is moving. It is calculated by dividing the distance covered by the time taken.
2. Question: What is the basic unit of time?
Answer: Second
Explanation: The standard unit used to measure time is the second, denoted as ‘s’.
3. Question: What is the motion of a pendulum called?
Answer: Periodic
Explanation: The to and fro motion of a pendulum repeats after equal intervals of time, so it is called periodic motion.
4. Question: Which meter is used in vehicles to measure speed?
Answer: Speedometer
Explanation: Speedometer is a device fitted in vehicles to show the speed directly in km/h or m/s.
5. Question: What is the term for an object moving in a straight line with constant speed?
Answer: Uniform motion
Explanation: When an object covers equal distances in equal intervals of time, it is said to be in uniform motion.
6. Question: What type of motion is shown by a child on a see-saw?
Answer: Oscillatory
Explanation: The to and fro motion of a see-saw is called oscillatory motion.
7. Question: What device was used in ancient times to measure time using sunlight?
Answer: Sundial
Explanation: Sundial is an old time-measuring device that uses the shadow of the sun to measure time.
8. Question: What is the total distance covered divided by total time taken called?
Answer: Average speed
Explanation: Since an object may not move at the same speed throughout, the total distance divided by total time gives average speed.
9. Question: What is the motion of a child in a merry-go-round called?
Answer: Circular
Explanation: When an object moves along a circular path, its motion is called circular motion.
10. Question: Which part of a pendulum is suspended from a stand?
Answer: Bob
Explanation: The metallic ball or stone tied to the thread in a simple pendulum is called its bob.
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