A car moving with a speed of 50km hr

Asked by admin @ 11/08/2021 in Physics viewed by 328 People

a car moving with speed of 50 km/hr,can be stopped by brakes after at least 6m. if the same car is moving at a speed of 100km/hr,the minimum stopping distance is

Answered by admin @ 11/08/2021

Given

Speed = 50 km/hr

Speed of car= 50 km/hr

when brakes applied final velocity become zero,

So we apply third equation of motion

v²- u² = 2 as

where u = Initial value = 50 km/hr

v = Final value = 0

a= acceleration

s = Distance = 6 m

Applying the value in formulae

v²- 50² = 2 a × 6

a = -2500 /12

To find minimum stopping distance

v² = 2 a s + u²

100² = 2 × (-2500/12 ) s

100 ×100 × 6 / 2500 = s

24 m = s

An automobile moving at a speed of 72km h

Asked by admin @ 23/08/2021 in Physics viewed by 317 persons

an automobile moving at a speed of 72km h reaches the foot of a smooth incline when the engine is switched off. how much distance does the automobile go up …

When an automobile moving with a speed of 36

Asked by admin @ 20/08/2021 in Physics viewed by 344 persons

When an automobile moving with a speed of 36 km/hr reaches an upward inclined road of angle 30 degree, its engine is switched off. If the coefficient of friction is …

A conveyor belt is moving at a constant speed

Asked by admin @ 17/08/2021 in Physics viewed by 298 persons

A conveyor belt is moving at a constant speed of 2m/s.A box is gently dropped on it.The coefficient of fric9between

If a cyclist moving with a speed of 4.9

Asked by admin @ 17/08/2021 in Physics viewed by 279 persons

If a cyclist moving with a speed of 4.9 m/s on a level road can take a sharp circular turn of radius4 m, then the coefficient of friction between …

Body a of mass 4m moving with speed u

Asked by admin @ 17/08/2021 in Physics viewed by 310 persons

Body A of mass 4m moving with speed u collides with another body B of mass 2m,at rest.the collision is head on and elastic in nature.after the collision the fraction …

A ball is moving with speed 20m s collides

Asked by admin @ 16/08/2021 in Physics viewed by 302 persons

a ball is moving with speed 20m/s collides with a smooth surface as shown in fif. the magnitude of change in velocity of the ball will be

A bullet moving with a speed of 100m s

Asked by admin @ 16/08/2021 in Physics viewed by 325 persons

a bullet moving with a velocityof 100m/s can just penetrate two planks of equal thickness. thenumber of such planks penetrated by the same bullet when the velocity is doubled will …

A motorcycle moving with a speed of 5m s

Asked by admin @ 12/08/2021 in Physics viewed by 395 persons

a motorcycle moving with a speed of 5m/s obtains to an acceleration of 0.2m/s .calculate the speed of the motorcycle after 10sec and the distance travelled by it in this …

When the speed of a moving body is doubled

Asked by admin @ 11/08/2021 in Math viewed by 435 persons

When the speed of a moving body is doubled what will be the effect on its kinetic energy?

An object moving with a speed of 6.25

Asked by admin @ 31/08/2021 in Physics viewed by 295 persons

An object moving with the speed of 6.25 m/s is decelerated at a rate given by dv/dt = -2.5 √v where v is the instantaneous speed . the time taken …

Change the speed 6m s into km hr

Asked by admin @ 31/08/2021 in Physics viewed by 311 persons

Change the speed of 6m/s into km/h?

Consider a car moving on a straight road

Asked by admin @ 29/08/2021 in Physics viewed by 312 persons

Consider a car moving on a straight road with a speed of 100 m/s. the distance at which car can be stopped is [μk = 0.5] 100 m/s

Two cars are moving in the same direction

Asked by admin @ 25/08/2021 in Physics viewed by 347 persons

Two cars are moving in the same direction with the same speed of 30km/h. They are separated by 5km. What is the speed of the car moving in the opposite …