# physics

a vehicle is accelerating on a straight road. Its velocity at any instant is 30 km/hr, after 2 s, it is 33.6 km/hr and after further 2 s, it is 37.2 km/hr. Find the acceleration of vehicle in m/s^2

1. 👍 0
2. 👎 0
3. 👁 892
1. Here,
u1 = 30 km/h
t = 2 s
u2 = 33.6 km/h
a = (u2 – u1)/t
a1 = (33.6 – 30)/2 = 1.8 ms-2
Similarly, a2 = (37.2 – 33.6)/2 = 1.8 ms-2
The acceleration of the vehicle is 1.8 ms-2

1. 👍 2
2. 👎 11
posted by Elena
2. Here,
after 2s, velocity risses with about 3.6 km/hr

so,
3.6/2 = 1.8 km/hr

(1.8*1000)metre per second/(60*60)second

=(5/10)m/s
=0.5m/s

1. 👍 7
2. 👎 0
posted by Troy

1. 👍 1
2. 👎 0
4. Here,
u1 = 30 km/h
t = 2 s
u2 = 33.6 km/h
a = (u2 – u1)/t
a1 = (33.6 – 30)/2 = 1.8 ms-2
Similarly, a2 = (37.2 – 33.6)/2 = 1.8 ms-2
The acceleration of the vehicle is 1.8 ms-2
Here,
after 2s, velocity risses with about 3.6 km/hr

so,
3.6/2 = 1.8 km/hr

(1.8*1000)metre per second/(60*60)second

=(5/10)m/s
=0.5m/s
yes, it is
acceleration uniform

1. 👍 6
2. 👎 1
posted by TanmY
5. You are genius ..

1. 👍 0
2. 👎 0

1. 👍 1
2. 👎 0
7. thank you

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Velocity

Which of these statements are true... I think (1)and (5) are correct 1)A reversing vehicle must have negative velocity 2) A stationary object must have zero position 3)Two vehicles trvelling at the same speed at the same instant

asked by leo on March 23, 2008
2. ### Maths/Physics

Which of these statements are true... I think (1)and (5) are correct 1)A reversing vehicle must have negative velocity 2) A stationary object must have zero position 3)Two vehicles trvelling at the same speed at the same instant

asked by leo on March 23, 2008
3. ### Calculus

A four-wheel-drive vehicle is transporting an injured hiker to the hospital from a point that is 30 km from the nearest point on a straight road. The hospital is 60 km down that road from that nearest point. If the vehicle can

asked by James P on October 30, 2019
4. ### MAths

A four-wheel-drive vehicle is transporting an injured hiker to the hospital from a point that is 30 km from the nearest point on a straight road. The hospital is 70 km down that road from that nearest point. If the vehicle can

asked by Rajesh on December 15, 2015
5. ### Physical Science

So, please check my answers here: 1. Which example identifies a change in motion that produces acceleration? A) A speed skater moving at a constant speed on a straight track** B) A ball moving at constant speed around a circular

asked by Rosie on January 18, 2020
1. ### Math

Two vehicles are moving at a velocity of 100km/hr and 60km/hr the magnitude along the road is 500km and the vehicle with a vehicle with a velocity of 100km/hr began the journey 2.5 hrs ealier.CALCULATE the distance the vehicle

asked by Robert on May 3, 2014
2. ### physics

A car starts from rest and accelerates uniformly along a straight horizontal road at 3 metres second squeared for 4 seconds,after which it continues with a constant velocity for a further 6 seconds.CALCULATE THE MAGNITUDE OF THE

asked by Anonymous on September 3, 2011
3. ### Physical Science

A car starts from rest and accelerates uniformly along a straight horizontal road at 3 metres second squeared for 4 seconds,after which it continues with a constant velocity for a further 6 seconds.What is the magnitude of the

asked by Anonymous on September 3, 2011
4. ### math

What is true for motion in a straight line. A. if a vechile has zero velocity , it must be stationary. B.the graph of position against time has to be a straight line. C.acceleration is the rate of change of speed. D.velocity is

asked by JAndu Andu on May 16, 2010
5. ### physics

Two cars are driving toward each other on a straight and level road in Alaska. The BMW is traveling at 115 km/h north and the VW is traveling at 54.0 km/h south, both velocities measured relative to the road. At a certain instant,

asked by Lisa on September 20, 2012

More Similar Questions