physics

A sports car of mass 950 kg (including the driver) crosses the rounded top of a hill (r = 88 m) at 27 m/s.

Determine the normal force exerted by the road on the car. Determine the normal force exerted by the car on the 72-kg driver.

Express your answer using two significant figures.

  1. 👍
  2. 👎
  3. 👁
  1. force =mg-mv^2/r where m is 72kg.

    1. 👍
    2. 👎
    👤
    bobpursley
  2. Is the equation above used to determine the normal force exerted by the road on the car?

    When I used the equation I got (72)(9.8) - (72)(729)/88 = 1.2 (2 sig figs)

    This answer was incorrect. What am I doing wrong.

    And.... what equation can I use to figure out the 2nd part?

    1. 👍
    2. 👎
  3. if you haven't already figured it out the equation is for both the driver and car,

    a)you pluged in for driver but it should be weight of the car so its
    =(950 * 9.8)-(950*729/88)
    B)you have already figured out
    =(72)(9.8) - (72)(729)/8
    C) to determine the speed of the car with no normal force exerted on the driver you simply V= sqrt(91*9.8)

    1. 👍
    2. 👎
  4. sorry i made some typing errors
    B)=(72 * 9.8) - (72*729/88)
    which i got 109 and that = 1.1 *10^2
    C)v= sqrt(88*9.8)
    the 91 was from my problem i had to do.
    hope this helps

    1. 👍
    2. 👎
  5. B=72-9-8

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    several students are riding in bumper cars at an amusement park. the combined mass of a car A and its occupants is 250 kg. the combined mass of car B and its occupants is 200 kg. Car A is 15 m away from car B and moving to the

  2. physics

    A sports car of mass 950kg (including the driver) crosses the rounded top of a hill (radius = 95m) at 22m/s. Determine a) the normal force exerted by the road on the car, b) the normal force exerted by the car on the 72kg driver,

  3. Physics

    A car is traveling at 11.0 m/s, and the driver sees a traffic light turn red. After .59 s (the reaction time), the driver applies the brakes, and the car decelerates at 8 m/s^2. What is the stopping distance of the car, as

  4. physics

    The driver of a car, traveling at a constant 25 m/s, sees a child suddenly run into the road. It takes the driver 0.45s to hit the brakes. As it slows, the car has a steady acceleration of 8.5 m/s^2. What's the total distance the

  1. physics

    A test car with a dummy driver of mass 60 kg was propelled towards a rigid wall. If the speed of the dummy driver just before impact was 40m/s and the time between the collision and the dummy coming to the rest was 0.10 s,

  2. physics

    Please decide which of the following statements for car collisions are true or false. 1)Crumple zones on cars are parts of the front of the car that are designed to receive maximum deformation during a head-on collision. The

  3. physics

    a sports car traveling at 27.8 m/s slows at a constant rate to a stop in 8.00 s. What is the displacement of the sports car in this time interval

  4. physic

    A roller-coaster car has a mass of 500 kg when fully loaded with passengers. The car passes over a hill of radius 15 m, as shown. At the top of the hill, the car has a speed of 8 m/s. What is the force of the track on the car at

  1. Physics

    A driver approaches an intersection at a speed of 50km/h, when the light turns amber. The driver applies brakes to get the maximum stopping force without skidding. The car has a mass of 1500kg and the force of static friction

  2. physics

    Suppose a car is traveling at +24.1 m/s, and the driver sees a traffic light turn red. After 0.366 s has elapsed (the reaction time), the driver applies the brakes, and the car decelerates at 8.00 m/s2. What is the stopping

  3. Physics

    A speed trap is set up with two pressure-activated strips placed across a highway, 110 m apart. A car is speeding along at 33 m/s, while the speed limit is 21 m/s. At the instant the car activates the first strip, the driver

  4. Physics

    Suppose a car is traveling at +24.8 m/s, and the driver sees a traffic light turn red. After 0.372 s has elapsed (the reaction time), the driver applies the brakes, and the car decelerates at 6.00 m/s2. What is the stopping

You can view more similar questions or ask a new question.