science
Grade-7
Easy
Question
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?
- R
- 2R
- 3R
- R/2
Hint:
Displacement is the shortest distance between two points.
The correct answer is: 2R
- Total time = 2 min 55 sec = 175 sec
- The boy completed one round in 50 sec
- After 3.5 rounds he will be on the opposite side.
- so, the displacement will be 2R.
Related Questions to study
science
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?
scienceGrade-7
science
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).
science
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
science
The ratio of distance to displacement is always ____.
The ratio of distance to displacement is always ____.
scienceGrade-7
science
A car traveled north-west for 350 m depicts ____.
A car traveled north-west for 350 m depicts ____.
scienceGrade-7
science
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
science
An object is said to be in a non-uniform motion when ____.
An object is said to be in a non-uniform motion when ____.
scienceGrade-7
science
Which of the following is the SI unit of velocity?
Which of the following is the SI unit of velocity?
scienceGrade-7
science
Which of the following is not an example of a periodic motion?
Which of the following is not an example of a periodic motion?
scienceGrade-7
science
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?
scienceGrade-7
science
A frame of reference consists of the _____ of the point of reference. It should be _____.
A frame of reference consists of the _____ of the point of reference. It should be _____.
scienceGrade-7
science
Which of the following is an example of random motion?
Which of the following is an example of random motion?
scienceGrade-7
science
Which of the following is an example of rectilinear motion?
Which of the following is an example of rectilinear motion?
scienceGrade-7
science
