# physics

posted by Vitus

An automobile travelling with an initial velocity of 25m/s is accelerated to 35m/s in 6 second. The wheel of automobile is 80cm in diameter. Find the angular acceleration

1. bobpursley

wi=25/.4 wf= 35/.4

angacceleration= (wf-wi)/time

2. David

From the Eqn of motion we have: v=u+at
=25+35*6
=360m/s
recall that angacceleration=v^2/r
r=40m,
=360^2*40
=3240m/s^2

## Similar Questions

1. ### PHYSICS

A spinning wheel on a fireworks display is initially rotating in a counterclockwise direction. The wheel has an angular acceleration of -3.80 rad/s2. Because of this acceleration, the angular velocity of the wheel changes from its …
2. ### calculus

X. An automobile with seven years of use has a commercial value of \$34057.7, but five years ago its value was \$72250. If the value of such automobile varies exponentially with the time. (36-41) 36.- What was the value of the automobile …
3. ### calculus

An automobile with seven years of use has a commercial value of \$34057.7, but five years ago its value was \$72250. If the value of such automobile varies exponentially with the time. (36-41) 36.- What was the value of the automobile …
4. ### science

please help...A wheel 1.0m in diameter is rotating about a fixed axis with an initial angular velocity of 2rev.s-1.the angular acceleration is 3rev.s-1. (1)compute the angular velocity after 6s. (2)through what angle has the wheel …
5. ### Calculus

Two automobiles are travelling on intersecting roads. The first automobile is travelling northeast at 35 km/h. The second automobile begins 7 km north of the first, and it is travelling east at 25 km/h. Assuming that these cars will …
6. ### Physics

A 1480 kg automobile has a wheel base (the distance between the axles) of 2.9 m. The center of mass of the automobile is on the center line at a point 1.34 m from the front axle. Find the force exerted by the ground on each back wheel. …
7. ### Physics

An automobile moving at a constant velocity of 25m/s passes a gasoline station. Two seconds later, another automobile leaves the gasoline station and accelerates at a constant rate of 4.0m/s^2. how soon will the second automobile overtake …
8. ### Trigonometry

An automobile tire has a diameter of 36 inches. How many revolution will the wheel make as the automobile travel 1 mile
9. ### physics

A 2000-kg automobile with four-wheel drive and weight distributed equally on the four 60-cm diameter wheels can accelerate from 0 to 27 m/s (60 MPH) in 6 seconds. a. Calculate the minimum coefficient of static friction between the …
10. ### S

An automobile travelling at 80km/hrs has tyres of radius 80cm. On applying brakes the car is brought to a stop in 30 complete turns of the tyres. What is the magnitude of the angular acceleration of the wheels?

More Similar Questions