1. An object has moved through a distance . Can it
have a Zero displacement? If yes, Support your
Answer.
2. When will you say a body is in (a) Uniform
Acceleration
(b) Non-Uniform Acceleration
3. What does Odometer of an automobile Measure?
4. Distinguish between Speed and Velocity.
5. Numerical :
(a) A bus decreases it’s speed from 80km/hr to
60km/hr in 5 seconds. Find acceleration of
bus.
Answer fastly and correctly
I need it
Answers
5. 1km/h = 5/18 m/s
so,80km/h = 5/18×80 = m/s (please take out the ans)
60km/h = 5/18×60 =
acceleration = v-u/t
Answer:
1: Yes, if object has moved through a distance, it surely can has zero displacement. as displacement is a vector quantity depending on starting and ending position not on the path. For example, 1 circle of motion has distance 2πR but 0 displacement
2:According to newton's first law of motion, the acceleration of the body could be zero if there is no force acting on it. ... This happens when all the forces cancel out each other i.e the net force acting on the object is zero. For a uniformly moving object,the net force acting on the object is zero.
b):Acceleration is the rate at which an object's speed and direction are changing with time, so whenever an object passes through zero speed as it reverses directions it has a non-zero acceleration but a speed of zero.
3:Odometer is a device that measures the distance travelled by an automobile based on the perimeter of the wheel as the wheel rotates
4:Speed is the distance traveled by an object where as, velocity is distance traveled by an object per unit time in a particular direction. Speed is a scalar quantity where as velocity is a vector quantity.