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Science One word answer.

Motion · Gujarat Board (GSEB) STD 9 (GSEB - English Medium). 63 questions.

Questions · Page 2 of 2

One word answer.

Question 511 Mark
What is the displacement of a satellite when it makes a complete round along its circular path?
Answer
The displacement is always zero when satellite makes a complete round along its circular path. It is because of the fact that initial and final positions coincide in one complete round.
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Question 521 Mark
Under which condition is the magnitude of average velocity equal to average speed?
Answer
When the object moves in a single straight line, the magnitude of average velocity equal to average speed.
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Question 541 Mark
What does the slope of a speed-time graph indicate?
Answer
The slope of a speed-time graph indicates acceleration.
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Question 551 Mark
What conclusion can you draw about the acceleration of a body from the speed-time graph shown below?

Answer
It represents non-uniform acceleration.
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Question 561 Mark
What conclusion can you draw about the speed of a body from the following distance-time graph?

Answer
The body has uniform speed.
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Question 571 Mark
What can you say about the motion of a body whose distance-time graph is a straight line parallel to the time axis?
Answer
The body is not moving. It is stationary.
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Question 581 Mark
Area under the velocity-time graph line is 40m. What physical quantity does this area represent?
Answer
It represent the distance covered is 40 metre.
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Question 591 Mark
State whether the following statement is true or false:
Earth moves round the sun with uniform velocity.
Answer
No, earth moves round the sun with uniform speed, but its velocity changes continuously.
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Question 621 Mark
State whether speed is a scalar or a vector quantity. Give reason for your choice.
Answer
Speed is a scalar quantity as it has magnitude only, it has no specified direction.
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Question 631 Mark
Give two examples of bodies having non-uniform motion.
Answer
  1. Motion of a bus on a road.
  2. Motion of a racing horse.
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One word answer. - Page 2 - Science STD 9 Questions - Vidyadip