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