1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
makkiz [27]
3 years ago
5

A gymnast spring vertical upward from a trampoline as in figure. The gymnast leaves the trampoline at height of 1.20m and reache

s a maximum height of 4.80m before falling back down. all heights are all measured with respect to the ground. Ignoring air resistance, determine the initial speed “vo” with witch the gymnast leaves the trampoline.

Physics
1 answer:
vaieri [72.5K]3 years ago
4 0

Answer:

The initial velocity of the gymnast is 8.5 m/s.

Explanation:

We can use the kinematic equation

v_f^2= v_o^2+2ad

to figure out the initial velocity v_o of the gymnast.

Now, when the gymnast reaches the maximum height,  the distance he has traveled is d = 4.8m- 1.2m = 3.6 m, and his velocity is zero; therefore v_f =0.

Thus, we have

0 = v_0^2+2(-10m/s^2)(3.6m)

v_0^2=72m^2/s^2

\boxed{v_0= 8.5m/s}

You might be interested in
How do you double the speed in physics
Mariulka [41]

You measure the open distance between the floor and the bottom surface of the gas pedal.  Then you press the gas pedal down 1/2 of that distance.

3 0
3 years ago
A radio telescope detects an incoming radio wave which has a power of 1.00 x 10-24 W. If this signal creates a potential of 1.00
soldier1979 [14.2K]

Answer:

Therefore, the number of electrons moving through the receiver circuit per second is 6250 electrons/s.

Explanation:

Given:

Power of radio wave, P = 1 × 10⁻²⁴ W

Potential of signal, V = 1 × 10⁻⁹ V

Solution:

Consider the number of electrons flowing through the receiver circuit per second be 'n'.

The current flowing through the circuit will be:

I = P/V

 = (1 × 10⁻²⁴ W)/(1 × 10⁻⁹ V)

 = 1 × 10⁻¹⁵ A

Then, the number of electrons moving through the receiver circuit can be  calculated as:

ne = I

where, e is charge on an electron

            I is current flowing through the circuit

Applying values in above equation we get:

n(1.6×10⁻¹⁹ C) = (1 × 10⁻¹⁵ A)

n = (1 × 10⁻¹⁵ A)/(1.6×10⁻¹⁹ C)

n = 6250 electrons/s

Therefore, the number of electrons moving through the receiver circuit per second is 6250 electrons/s.

Learn more about electron flow here:

<u>brainly.com/question/6531580</u>

#SPJ4

7 0
2 years ago
Bumper car A (281 kg) moving
emmainna [20.7K]

Answer:

1.88 m/s

Explanation:

from elastic collision

KE before collision = KE after collision

8 0
3 years ago
Read 2 more answers
Which best describes how geothermal energy is used to make electricity?. . A.. Rocks are split to release energy that drives a s
In-s [12.5K]
Answer is b that is  Heat energy from below the ground converts water to steam to drive a steam turbine attached to an electrical generator.. . 
6 0
3 years ago
A bowling ball has a mass of 6 kg what happens to its momentum when its speed increases from 2m/s to 4m/s?
GalinKa [24]
Can you tell it in pounds
6 0
3 years ago
Other questions:
  • A 9.5 v battery supplies a 3.5 ma current to a circuit for 6.0 h . part a how much charge has been transferred from the negative
    10·1 answer
  • A residential subdivision encompasses 1100 acres with a housing density of four houses per acre. Assume that a high-value reside
    7·1 answer
  • or Ethernet, if an adapter determines that a frame it has just received is addressed to a different adapter it discards the fram
    7·1 answer
  • What is an anemometer used to measure?
    5·1 answer
  • The search for black holes involves searching for Group of answer choices single stars that emit large amounts of X-rays. a stel
    15·1 answer
  • True or false:The potential energy of an object is affected by its speed
    12·1 answer
  • 1. express the following in proper SI form using the appropriate prefixes. a. 52500000 m b. 1000 g c. 2435200000​
    15·1 answer
  • What are the colours used in a printer to produce a coloured poster?​
    13·1 answer
  • Who discovered that the earth revolves around the sun
    14·1 answer
  • While buying a hot plate you notice the resistance of the hot
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!