A flea can jump straight up to a height of 22.0 cm

A flea can jump straight up to a height of 22.0 cm.

(a) What is its initial speed (in m/s) as it leaves the ground, neglecting air resistance?
(b) How long is it in the air?
(c) What are the magnitude and direction of its acceleration while it is
i. moving upward?
ii. moving downward?
iii. at the highest point?

Expert Solution

maximum height=u^2/2g
0.22=u^2/2*9.8
u=2.076m/s
initial speed=2.076m/s
how long is it in the air=2u/g
=2*2.076/9.8
=0.424 seconds
c)while it is moving upwards,acceleration towards downward direction and magnitude of 9.8m/s^2
while it is moving downwards,acceleration is towards downward direction and magnitude of 9.8m/s^2
while it is maximum point,acceleration is towards downward direction and magnitude of 9.8m/s^2

genius_generous answered 2 years ago

A flea is able to jump straight up about 0.52 m. It has been said that...

A flea is able to jump straight up about 0.52 m. It has been said that if a flea were as big as a human, it would be able to jump over a 100-story building! When an animal jumps, it converts work done in contracting muscles into gravitational potential energy (with some steps in between). The maximum force exerted by a muscle is proportional to its cross-sectional area, and the work done by the muscle is this force times the...

A rubber ball is tossed straight up from a height of 10 feet with a velocity...

A rubber ball is tossed straight up from a height of 10 feet with a velocity of 78 feet per second. The first time it hits the ground (y = 0), it rebounds with a velocity of 64 feet per second2 . The second time it hits the floor, it rebounds with a velocity of 48 feet per second. Before the first bounce 1. Find the function y = h1(t) for the height of the ball before its first bounce....

In a high jump competition: What would be the maximum height an athlete could jump using...

In a high jump competition: What would be the maximum height an athlete could jump using a pole? Find out what the world record is and compare with its result. Does your reasoning allow you to understand why a good pole vaulter has to be a very fast runner? Can your method be applied to estimate maximum height in a pole vault high jump competition? Why can you jump higher with the pole than without it? The figure shows the...

A projectile is launched straight up at 55.5 m/s from a height of 71 m, at...

A projectile is launched straight up at 55.5 m/s from a height of 71 m, at the edge of a sheer cliff. The projectile falls just missing the cliff and hitting the ground below. (a) Find the maximum height of the projectile above the point of firing. m (b) Find the time it takes to hit the ground at the base of the cliff. s (c) Find its velocity at impact. m/s

5) A rectangular coil of wire, 22.0 cm by 35.0 cm and carrying a current of...

5) A rectangular coil of wire, 22.0 cm by 35.0 cm and carrying a current of 1.40 A, is oriented with the plane of its loop perpendicular to a uniform 1.50-T magnetic field, as shown in the figure. a) Calculate the net force which the magnetic field exerts on the coil b) Calculate the torque which the magnetic field exerts on the coil c) The coil is rotated through a 30.0degrees angle about the axis shown, the left side coming...

A flea jumps by exerting a force of 1.27 10-5 N straight down on the ground. A...

A flea jumps by exerting a force of 1.27 10-5 N straight down on the ground. A breeze blowing on the flea parallel to the ground exerts a force of 1.12 10-6 N on the flea. Find the direction and magnitude (in m/s2) of the acceleration of the flea if its mass is 6.0 10-7 kg. (Let us assume that Fwind points to the right. We will consider this to be the +x direction and vertical to be the +y direction.) magnitude m/s2 direction °...

Alice tosses a ball straight up. After 2s it has reached a height of 5m measured...

Alice tosses a ball straight up. After 2s it has reached a height of 5m measured from where the ball was launched. i) What is the initial speed of the ball? ii) Assume that Alice released the ball 1m above the ground. What is the maximum height of the ball? iii) How long is the ball in the air? iv) What is the velocity of the ball when it hits the ground?

You can jump to a height of 2.6625 ft (0.81153 m) on Earth. If you expend the same energy jumping on

You can jump to a height of 2.6625 ft (0.81153 m) on Earth. If you expend the same energy jumping on the moon where the acceleration of gravity is only 1.6 m/s2, how high would you rise?

a ball thrown straight up returns to its starting height in 7.2s.its initial speed was----------m/s.

In the figure, a square of edge length 22.0 cm is formed by four spheres of...

In the figure, a square of edge length 22.0 cm is formed by four spheres of masses m1 = 4.70 g, m2 = 2.50 g, m3 = 1.40 g, and m4 = 4.70 g. In unit-vector notation, what is the net gravitational force from them on a central sphere with mass m5 = 2.40 g?

Question