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
Sholpan [36]
3 years ago
14

A ball is thrown straight up. It passes a 2.00-m-high window 7.50 m off the ground on its path up and takes 1.30 s to go past th

e window. What was the ball's initial velocity?
Physics
1 answer:
OLga [1]3 years ago
5 0

Answer:

u =  13.67 m/s

Explanation:

given,

window height = 2 m

window is 7.5 m off the ground on its path up

total distance from the ground to pass the window = 2 + 7.5 = 9.5 m

time taken to go past the window = 1.30 s

using equation of motion

S = u t +\dfrac{1}{2}gt^2

(2+7.5)= u\times 1.3 -0.5\times 9.8\times 1.3^2

u\times 1.3 = 9.5 + 8.281

u =  13.67 m/s

hence, the initial velocity of the  ball is equal to 13.67 m/s

You might be interested in
Newton believed that time and space are absolute, while Einstein believed that the _______ is absolute.
8_murik_8 [283]
Speed of light 

According to Einstein, the speed of light is constant in all points of reference.  In addition, he pointed out the speed of light is the maximum speed known since in practice one can never catch up with the beam of light. This is explained by his theory of relativity. 
6 0
3 years ago
Read 2 more answers
What is an independent or manipulated variable?
Paha777 [63]

Is the variable you change, independent, I, something I change.

5 0
3 years ago
......................
Ierofanga [76]
Don’t trust those links they usually pull up your IP
4 0
3 years ago
A box slides down a frictionless incline, gaining speed. The work done by the normal force n is _______.
jeka57 [31]

The work done by the normal force n when the box slides down a frictionless incline and gaining speed is zero.

<h3>What is normal force?</h3>

The force of contact is called the normal force. When the two surfaces are in contact with each other, then the normal force acts.

This force is applied by the solid bodies on each other in order to prevent the passing through each other.

A box slides down a frictionless incline, gaining speed. For this box, the value of work done by normal force has to be found out. Let's analyze the given condition.

  • The body is gaining the speed, which means there is a change in kinetic energy.
  • The change in kinetic energy is equal to the work done.
  • The friction force is the product of coefficient of the friction and normal force.
  • The friction force for the given case is zero. Thus, the normal force must be equal to the zero.

Thus, the work done by the normal force n when the box slides down a frictionless incline and gaining speed is zero.

Learn more about the normal force here;

brainly.com/question/10941832

7 0
2 years ago
Read 2 more answers
What will happen if you drop a golf ball, a baseball, and a bowling ball at the same instant from the top of a tall building
V125BC [204]
Depending on the height of the building they can break due to impact on the floor.
8 0
3 years ago
Other questions:
  • A 3-m-high, 7-m-wide rectangular gate is hinged at the top edge and is restrained by a fixed ridge. Determine the hydrostatic fo
    9·1 answer
  • What are the three points of the fire triangle
    6·1 answer
  • A car rounds a flat curve and experiences a centripetal force directed toward the center of the curve and perpendicular to the d
    7·2 answers
  • Which of these is a landform created due to erosion by glaciers? Delta Horn Sandbars Spit
    13·1 answer
  • What is the speed of light m/s
    14·2 answers
  • What are two ways in which all types of precipitation are alike
    13·1 answer
  • a water wav e has frequency of 2hz and there are 3 meters between each crest on the wave. how fast is the wave moving
    12·1 answer
  • SOUND IS A FORM OF WAVE.LIST AT LEAST 3 REASONS TO SUPPORT IDEA THAT SOUND IS A WAVE.
    13·1 answer
  • How much work is done when a 100 N force moves a block 59 m?
    5·1 answer
  • What makes up the atomic mass of an element?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!