physics

posted by .

A child operating a radio-controlled model car on a dock accidentally steers it off the edge. The car's displacement 0.58 s after leaving the dock has a magnitude of 7.1 m. What is the car's speed at the instant it drives off the edge of the dock?

  • physics -

    What do you mean by displacement? Horizontal distance from the edge, or the actual slant distance (the resultant of vertical and horizontal components) from the edge?

    I will assume the latter, since you refer to the magnitude.

    In 0.58 s, the car will fall
    Y = (g/2)*t^2 = 1.648 meters
    The horizontal distance it will have moved is then
    X = sqrt[(7.1)^2 - (1.648)^2] = 6.91 m
    The car's speed at the edge would be
    X/t = 6.91/0.58 = 11.9 m/s

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    Two cars both start from rest and have the same constant acceleration. When radar is used to measure the velocity of each car, car A is found to be moving twice as fast as car B. At the instant the radar is used, car A has a displacement …
  2. physics

    The car's displacement 0.7 s after leaving the dock has a magnitude of 14.0 m. What is the car's speed at the instant it drives off the edge of the dock?
  3. physics

    A child operating a radio-controlled model car on a dock accidentally steers it off the edge. The car's displacement 1.0 s after leaving the dock has a magnitude of 12.8 m. What is the car's speed at the instant it drives off the edge …
  4. Phy 131

    A child operating a radio-controlled model car on a dock accidentally steers it off the edge. The car's displacement 0.65 s after leaving the dock has a magnitude of 8.4 m. What is the car's speed at the instant it drives off the edge …
  5. physics

    A child is in danger of drowning in the Merimac river. The Merimac river has a current of 3.1 km/hr to the east. The child is 0.6 km from the shore and 2.5 km upstream from the dock. A rescue boat with speed 24.8 km/hr (with respect …
  6. physicsssss

    A child is in danger of drowning in the Merimac river. The Merimac river has a current of 3.1 km/hr to the east. The child is 0.6 km from the shore and 2.5 km upstream from the dock. A rescue boat with speed 24.8 km/hr (with respect …
  7. Physics

    A 24-ton freight car rolls along a straight track with a speed of 10mph. A 2.0 ton automobile falling vertically lands on the freight car from above. a) what is the speed of the freight car after the car lands on it?
  8. physics

    a car starts from rest at constant acceleration of 2m/s2 at the same instant, a truck travelling at a constant speed of 10m/s overtakes and passes the car i) how far beyond the starting point will the car overtake the truck ii) after …
  9. Physics

    A child operating a radio-controlled model car on a dock accidentally steers it off the edge. The car's displacement 0.95 s after leaving the dock has a magnitude of 6.7 m. What is the car's speed at the instant it drives off the edge …
  10. PHYSICS

    A child (25 kg) walks along a 4 m plank of uniform density (m=8kg) that is laying with one end extending 1 m off the end of a dock. 1. Where is the ceanter of mass located in the plank?

More Similar Questions