science
Grade-7
Easy
Question
Pick the odd one out
- The motion of a roller coaster
- The motion of a giant wheel
- The motion of a drunkard on the street
- The motion of a break dance ride
Hint:
The motion of a giant wheel is different from other options.
The correct answer is: The motion of a giant wheel
the motion of a giant wheel is rotatory i.e. rotational motion while others are in random motion.
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The rate of change of displacement is called ___. Its SI unit is ___.
The rate of change of displacement is called ___. Its SI unit is ___.
scienceGrade-7
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What kind of motion do the blades of a fan (switched on) make?
a) Rotational motion
b) Periodic motion
c) Random motion
d) Oscillatory motion
What kind of motion do the blades of a fan (switched on) make?
a) Rotational motion
b) Periodic motion
c) Random motion
d) Oscillatory motion
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Speed + direction = ___.
Speed + direction = ___.
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Sheena wanted to measure the displacement between two points of her house. She has fixed an iron nail at each point. Which of the following methods can she follow?
a. Tie a thread to the first nail and then tie it to the other nail. Measure the length of the thread between those two points using a ruler.
b. Tie a thread to the first nail and tie the other end of the thread to the second nail so that the thread is taut and measure the length of the thread used using a ruler.
c. Fix one end of the measuring tape to the first nail and stretch it towards the second nail and record the measurement.
If the line between two points is straight, then only it will show displacement.
Sheena wanted to measure the displacement between two points of her house. She has fixed an iron nail at each point. Which of the following methods can she follow?
a. Tie a thread to the first nail and then tie it to the other nail. Measure the length of the thread between those two points using a ruler.
b. Tie a thread to the first nail and tie the other end of the thread to the second nail so that the thread is taut and measure the length of the thread used using a ruler.
c. Fix one end of the measuring tape to the first nail and stretch it towards the second nail and record the measurement.
scienceGrade-7
If the line between two points is straight, then only it will show displacement.
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A boy is running along a circular path of radius R. He completes one revolution in 50 s. What is the displacement of the boy after 2 minutes 55 seconds?
A boy is running along a circular path of radius R. He completes one revolution in 50 s. What is the displacement of the boy after 2 minutes 55 seconds?
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An object covers the first 30 m of the journey in 5 seconds and the next 30 m in 3 seconds. What is the average speed of the object?
An object covers the first 30 m of the journey in 5 seconds and the next 30 m in 3 seconds. What is the average speed of the object?
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A horse covers 500 m in 2 minutes. Its speed in SI units is ___.
The SI unit of distance is Meter(m) and SI unit of time is Seconds (s).
A horse covers 500 m in 2 minutes. Its speed in SI units is ___.
scienceGrade-7
The SI unit of distance is Meter(m) and SI unit of time is Seconds (s).
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An object is moving in a straight line in the same direction. Its average velocity is ____ it’s average speed.
An object is moving in a straight line in the same direction. Its average velocity is ____ it’s average speed.
scienceGrade-7
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The ratio of distance to displacement is always ____.
The ratio of distance to displacement is always ____.
scienceGrade-7
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A car traveled north-west for 350 m depicts ____.
A car traveled north-west for 350 m depicts ____.
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Which of the following statements is true about choosing a point of reference to observe and specify the state of a body?
a) It can be any point in the surrounding of the object under observation.
b) It must be a stationary point in the surrounding of the object under observation.
c) It can be a point in the vicinity of the object under observation
Which of the following statements is true about choosing a point of reference to observe and specify the state of a body?
a) It can be any point in the surrounding of the object under observation.
b) It must be a stationary point in the surrounding of the object under observation.
c) It can be a point in the vicinity of the object under observation
scienceGrade-7
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An object is said to be in a non-uniform motion when ____.
An object is said to be in a non-uniform motion when ____.
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Which of the following is the SI unit of velocity?
Which of the following is the SI unit of velocity?
scienceGrade-7
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Which of the following is not an example of a periodic motion?
Which of the following is not an example of a periodic motion?
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Which is the physical quantity used to measure the rate of motion of an object in a non-uniform motion?
Which is the physical quantity used to measure the rate of motion of an object in a non-uniform motion?
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