physics

posted by .

a 2390 kg car traveling to the west at 22.4 m/s slows down uniformly under a force of 8740 N to the east.
(a) How much force would be required to cause the same acceleration on a car of mass 3140 kg? Answer in units N
(b) How far would the car move before stopping? Answer in units of m.

  • physics -

    (a) If the two cars have the same deceleration rate, the applied force must be proportional to the mass. The speed does not matter for this part.

    (b) The deceleration rate is a = F/m = 3.66 m/s^2
    The average speed while decelerating is Vav = 22.4 m/s/2 = 11.2 m/s
    The time spent decelerating is T = Vo/a = 6.12 seconds
    Distance travelled = Vav*T = ?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    A 2340 kg car traveling to the west at 20.7 m/s slows down uniformly under a force of 8340 N to the east. a) How much force would be required to cause the same acceleration on a car of mass 3180 kg?
  2. Physics

    A 1200 kg car accelerates to the right at 7m/s2 along a special frictionless track. Determine the magnitude and direction of the force the engine exerts to accelerate the car?
  3. Physics

    A 2010 kg car traveling to the west at 18.5 m/s slows down uniformly under a force of 8880 N to the east. a) How much force would be required to cause the same acceleration on a car of mass 3120 kg?
  4. physics

    A car traveling east at 42.4 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 25.0 m/s in 4.00 s. (a) What is the magnitude and direction of the car's acceleration as it slows down?
  5. Physics

    Two cars drive on a straight highway. At time t = 0, car 1 passes mile marker 0 traveling due east with a speed of 22.0 m/s. At the same time, car 2 is 1.4 km east of mile marker 0 traveling at 30.0 m/s due west. Car 1 is speeding …
  6. Physics

    Need Help with physics! Two cars drive on a straight highway. At time t = 0, car 1 passes mile marker 0 traveling due east with a speed of 17.0 m/s. At the same time, car 2 is 1.3 km east of mile marker 0 traveling at 30.0 m/s due …
  7. Physics -Impulse- part 2

    1) A 0.50 kg object is at rest. A 3.00 N force to the right acts on the object during a time interval of 1.50 s a) What is the impulse?
  8. physics

    a 2250 kg car is traveling at 20 m/s to the west. the force required to stop the car at 7890 N to the east. How long will it take the car to stop?
  9. Physics

    A 1500 kg car traveling at 100 km/h west collides with a 1200 kg car traveling east at 85 km/h. The heavier car slows to 25 km/h after the collision. How fast is the lighter car traveling after the two cars collide?
  10. Physics

    A 1340-kg car traveling east at 13.6 m/s (20 mi/h) has a head-on collision with a 1930-kg car traveling west at 20.5 m/s (30 mi/h). If the collision time is 0.10 s, what is the force needed to restrain a 68-kg person in the smaller …

More Similar Questions