Advertisements
Advertisements
Question
Write the formula for acceleration. Give the meaning of each symbol which occurs in it.
Advertisements
Solution
Acceleration is the change in velocity per unit time; it is a vector quantity.
`"Acceleration" = "Change in velocity"/"Time taken"`
The above expression can also be written as :
`a = (v-u)/t`
Where,
a = Acceleration
v = Final velocity
u = Initial velocity
t = Time taken
APPEARS IN
RELATED QUESTIONS
A tortoise moves a distance of 100 metres in 15 minutes. What is the average speed of tortoise in km/h ?
A train travels the first 15 km at a uniform speed of 30 km/h; the next 75 km at a uniform speed of 50 km/h; and the last 10 km at a uniform speed of 20 km/h. Calculate the average speed for the entire train journey.
Write the formula to calculate the speed of a body moving along a circular path. Give the meaning of each symbol which occurs in it.
Which of the quantity-velocity or acceleration-determines the direction of motion?
Arrange the following speeds in increasing order.
10 m s-1, 1 km min-1 and 18 km h-1.
A car accelerates at a rate of 5 m s-2. Find the increase in its velocity in 2 s.
A car is moving with a velocity 20 m s-1. The brakes are applied to retard it at a rate of 2 m s-2. What will be the velocity after 5 s of applying the brakes?
A train travels with a speed of 60 km h-1 from station A to station B and then comes back with a speed 80 km h-1 from station B to station A. Find -
- The average speed
- The average velocity of the train.
Write down the type of motion of a body along with the A – O – B of the following distance – time graph.

Define speed of a body.
