Advertisements
Advertisements
प्रश्न
A motorcycle is being driven at a speed of 20 m/s when brakes are applied to bring it to rest in five seconds. The deceleration produced in this case will be :
पर्याय
+ 4 m/s2
− 4 m/s2
+ 0.25 m/s2
−0.25 m/s2
उत्तर
We have,
Initial velocity = 20 m/s
Final velocity = 0 m/s
Time taken = 5 sec.
So,
Deceleration = – Acceleration
= –(0 – 20)/5
= 4 m/s2
So, the answer is + 4 m/s2
APPEARS IN
संबंधित प्रश्न
Comment on the statement ‘rest and motion are relative terms’. Give an example.
Fill in the blank using one of the word: at rest, in motion.
A person walking in a compartment of a stationary train is relative to the compartment and is relative to the platform.
Fill in the blank using one of the word : at rest, in motion.
A person sitting in a compartment of a moving train is relative to the other person sitting by his side and is relative to the platform.
A sprinter is running along the circumference of a big sports stadium with constant speed. Which of the following do you think is changing in this case?
Is the following statement correct? If not, modify it suitably to make it correct. "The earth moves round the sun with uniform velocity".
Gita travels with her father in a 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 at a speed of 1 km/minute.
Statement 2: She travels at a speed of 1 km/hour.
Motion occurs when the object is pulled or pushed by an agency.
Given below as Figure 13.8 is the distance-time graph of the motion of an object.
- What will be the position of the object in the 20s?
- What will be the distance travelled by the object in 12s?
- What is the average speed of the object?
Correct the following.
The motion of a swing is an example of rectilinear motion.
If a body does not change its position, then it is said to be at ______.
