Physics

A car travalling 90km/h, applies breaks with a force of 8400N to act on the 1050kg car.

a) what is the acceleration of the car when the breaks are applied?
b)how long does it take to stop.
c) how far does the car travel while it is breaking?

could anyone please help me with this, studying for exams and im not sure how to do this question.

F=ma or a=F/m

How long?

vfinal=vinit+ acceleration*time
notice acceleration is negative here.

How far?

distance=vinit*time + 1/2 a t^2

F=ma or a=F/m

How long?

vfinal=vinit+ acceleration*time
notice acceleration is negative here.

How far?

distance=vinit*time + 1/2 a t^2

  1. 👍 0
  2. 👎 0
  3. 👁 88
asked by Zam
  1. 2

    1. 👍 0
    2. 👎 0
    posted by bob

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    a car moving on a straight road with a speed of 20m/s. at t=0 the driver of the car applies the breaks after watching an obstacle 150m ahead. after application of breaks, the car retards with 2m/s^2. find the position of the car

    asked by pavatharani on July 3, 2011
  2. Physics please help!!

    A car starts from rest and travels for 5 seconds with a uniform acceleration of 2m/sec^2. The driver then applies the breaks causing a deceleration of 1.5m/sec^2. If the breaks are applied for 4 second, how fast is the car going

    asked by Megan on January 31, 2011
  3. Physics 20

    Dymamics unit A car standing still is struck by 2 other cars simultaneously. a beetle applies a force of 2350N [N60degreesE] and a truck applies a force of 4150N [SW]. What is the net force acting on the stationary car?

    asked by peter on April 6, 2011
  4. Physics 20

    Dymamics unit A car standing still is struck by 2 other cars simultaneously. a beetle applies a force of 2350N [N60degreesE] and a truck applies a force of 4150N [SW]. What is the net force acting on the stationary car?

    asked by peter on April 6, 2011
  5. Physics

    A car of mass is 100 kg applies break from 40 km per hours to 0 .it takes 12 seconds .what amount of force is applied for breaks?

    asked by S.C.D on July 24, 2014
  6. Physics

    An 800-kg car traveling in a straight line at a speed of 30 m/s applies its brakes. During braking, there is a net force of 2000 N in the horizontal direction on the car. What distance will the car move from the time it applies

    asked by Jub jub on February 13, 2012
  7. MATH

    A car is towing a trailer along a horizontal straight road using a horizontal tow-bar. The masses of the car and trailer are 1050kg and 200kg respectively. The resistance to motion of the car is 850N and the resistance to motion

    asked by Math Only For The Brave on October 26, 2013
  8. College Physic

    2) A car traveling with 5 m/s encounters a deer. The drivers slams on the breaks, the breaks lock. The car skids to a complete stop on the road ahead (and the deer runs away). Why does the car stop (where does all the kinetic

    asked by Mary on March 23, 2012
  9. physics

    A driver take 0.20 second to apply the breaks (reaction time). If he is driving car at a speed of 54 kmh–1 and the breaks cause a deceleration of 6.0 ms–2. Find the distance travelled by car after he sees the need to put the

    asked by sree on October 12, 2014
  10. Science

    A car is moving down a straight road.Suddenly a cat jumps in front of the car.The driver slams on the breaks and the passenger goes flying forwards.Why?What law of Newton applies to this situation?

    asked by Emily on January 24, 2017

More Similar Questions