Question

The acceleration produced the velocity of car increases from 30 km per hour 90 km per hour in 0.2 minute calculate the acceleration produced​? ​

Answer 1

Answer:

18000km/h² is the required acceleration of the car .

Explanation:

According to the Question

It is given that ,

• Initial velocity ,u = 30km/h
• Final velocity ,v = 90km/h
• Time taken ,t = 0.2min

we need to calculate the acceleration of the car .

Firstly we convert the unit here

Minutes into hour

➻ 1 hour = 60min

➻ 1min = 1/60 hour

➻ 0.2min = 1/60× 2/10

➻ 0.2 min = 2/600 = 1/300 hour.

As we know that acceleration is defined as the rate of change in velocity at per unit time.

• a = v-u/t

where,

a denote acceleration

v denote final velocity

u denote initial velocity

t denote time taken

Substitute the value we get

➻ a = 90-30/ ÷ 1/300

➻ a = 60×300/1

➻ a = 18000km/h².

• Hence, the acceleration of the car is 18000km/h².

Answer 2

Given :-

The acceleration produced the velocity of car increases from 30 km per hour 90 km per hour in 0.2 minute

To Find :-

Acceleration

Solution :-

1 km/h = 5/18 m/s

30 km/h = 30 × 5/18 = 5 × 5/3 = 25/3 m/s

90 km/h = 90 × 5/18 = 5 × 5 = 25 m/s

0.2 min = 12 second

a = v - u/t

a = (25 - 25/3)/12

a = (75 - 25/3)/12

a = (50/3)/12

a = 50/3 × 1/12

a = 50/36

a = 1.38 m/s²