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प्रश्न
Every object moves with a constant speed.
विकल्प
True
False
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उत्तर
This statement is False.
Explanation:
Objects do not always move with a constant speed; their speed can change due to acceleration or deceleration.
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संबंधित प्रश्न
The odometer of a car reads 57321.0 km when the clock shows the time 08:30 AM. What is the distance moved by the car, if at 08:50 AM, the odometer reading has changed to 57336.0 km? Calculate the speed of the car in km/min during this time. Express the speed in km/h also.
If a body traverses a distance in direct proportion to the time, the speed of the body is ______.
Can a body have negative speed?
A girl had designed a clap switch for a science exhibition that enabled her to switch on or off an alarm just with clapping of hands. While testing her device in a hall, she noticed that once the alarm has sounded it followed with another one due to echo of the clap, that is, the sound reflected by the walls. She recorded the two soundings of alarm with her tape recorder and found out that time difference in between them is 0.1 s. If the distance of the walls be 15 m, calculate the speed of sound.
On a 120 km track, a train travels the first 40 km at a uniform speed of 30 km/h. How fast must the train travel the next 80 km, so as to average 60 km/h for the entire trip.
Usain Bolt crossed 100 meters in ______ seconds and made a world record.
A bus travels 54 km in 90 minutes. The speed of the bus is ______.
A spaceship travels 36,000 km in one hour. Express its speed in km/s.
Distinguish between speed and velocity.
Distinguish between speed and velocity.
