physics

posted by .

The froghopper (Philaenus spumarius), the champion leaper of the insect world, has a mass of 12.3mg and leaves the ground (in the most energetic jumps) at 4.00m/s from a vertical start. The jump itself lasts a mere 1.00ms before the insect is clear of the ground. (a) find the force that the ground exerts on the froghopper during its jump. (b) express the force of (a) in terms of the frog hoppers weight.

  • physics -

    F=ma=mv/t =12.3•10⁻⁶•4/1•10⁻³ =49.2•10⁻³ N
    F/mg = 49.2•10⁻³/12.3•10⁻⁶•9.8 =408.2

  • physics -

    thank you

  • physics -

    did partial reflection and refraction still occur when light was travelling more slowly in the first medium than in second? explain?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. 5th grade math

    Three frogs had a race on a 1000 chart. Freaky Frog took 30 jumps of 25, Frogurt Frog took 30 jumps of 20, and Frannie Frog took 120 jumps of 5. Who was ahead?
  2. +1 SCIENCE PHYSICS

    A FROG SAW AN INSECT ON THE GROUND AT A HORIZONTAL DISTANCE OF 30 METER FROM IT. THE FROG CAN JUMP WITH A SPEED 20 METER/SECOND IN ANY DIRECTION. IT JUMPS WITH HIS INITIAL SPEED AND LAND ON THE INSECT. A: WHAT IS THA TYPE OF MOSSION …
  3. Algebra 1 / physics

    Multi-step prob During a trampoline competition, a trampolinist leaves the mat when her center of gravity is 6 feet above the ground. She has an initial vertical velocity of 32 ft/sec. a. Use the vertical motion model (h=-16t^2+vt+s) …
  4. science

    On average, froghopper insects have a mass of 12.3 mg and jump to a height of 428 mm. The takeoff velocity is achieved as the little critter flexes its leg over a distance of approximately 2.0 mm. Assume a vertical jump with constant …
  5. science

    On average, froghopper insects have a mass of 12.3 mg and jump to a height of 428 mm. The takeoff velocity is achieved as the little critter flexes its leg over a distance of approximately 2.0 mm. Assume a vertical jump with constant …
  6. physics

    A 78 kg volleyball player jumps and leaves the ground with a vertical velocity of 3.5 m/s. By thinking about the conservation of energy in a freefalling object, work out how high their centre of mass would reach at the top of their …
  7. physics

    The froghopper, Philaenus spumarius, holds the world record for insect jumps. When leaping at an angle of 58.0 degrees above the horizontal, some of the tiny critters have reached a maximum height of 58.7 cm above the level ground. …
  8. Algebra

    The masses of four different insects are given below. Insect A: 2.19*10^-4 g Insect B: 5.00*10^-3 g Insect C: 9.0*10^-2 g Insect D: 1.50*10^-3 g What is the order of these insects from heaviest to lightest?
  9. Algebra

    The masses of four different insects are given below. Insect A: 2.19*10^-4 g Insect B: 5.00*10^-3 g Insect C: 9.0*10^-2 g Insect D: 1.50*10^-3 g What is the order of these insects from heaviest to lightest?
  10. physics

    The froghopper Philaenus spumarius is supposedly the best jumper in the animal kingdom. To start a jump, this insect can accelerate at 4.00 km/s2 over a distance of 2.00 mm as it straightens its specially adapted“jumping legs.” …

More Similar Questions