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
Ivenika [448]
3 years ago
7

A ball is released from the top of a hill. How fast is the ball going when it reaches the base of the hill? Approximate g as 10

m/s2 and round the answer to the nearest tenth.
h1= 2m
h2=0.5m
No other information is given.
Physics
2 answers:
umka21 [38]3 years ago
8 0

The answer is: 5.5


Please mark as brainliest!

irina [24]3 years ago
5 0
First I’ll show you this standard derivation using conservation of energy:
Pi=Kf,
mgh = 1/2 m v^2,
V = sqrt(2gh)
P is initial potential energy, K is final kinetic, m is mass of object, h is height from stopping point, v is final velocity.
In this case the height difference for the hill is 2-0.5=1.5 m. Thus the ball is moving at sqrt(2(10)(1.5))=
5.477 m/s.
You might be interested in
Which of the following is an example of balanced forces?
Sergio [31]

A seesaw remains stationary when two students of equal weight sit on the ends

c

6 0
3 years ago
Read 2 more answers
Estimate the radiation pressure due to a bulb that emits 25 W of EM radiation at a distance of 6.5 cm from the center of the bul
Deffense [45]

..........................................................

8 0
3 years ago
What is the measurement of loudness of sounds
AURORKA [14]
The measurement of sound is in decibels.
4 0
3 years ago
What is the average speed in 4 seconds going 8 meters
gulaghasi [49]

Answer:

Explanation:

speed is define as rate of change of distance or displacement

v=s/t

s=8 m

t=4s

v=8/4

v=2 m/s

6 0
3 years ago
Read 2 more answers
An electric car uses a 45-kW (160-hp) motor. If the battery pack is designed for 340V, what current would the motor need to draw
alukav5142 [94]

Answer:

Current = 132.35 A

The motor needs to draw 132.35 Amperes current from the battery.

Explanation:

The formula of electric power is given as follows:

Power = (Voltage)(Current)

Current = Power/Voltage

In this question, we have:

Power = 45 KW = 45000 W

Voltage of Battery Pack = 340 V

Current needed to be drawn = ?

Therefore,

Current = 45000 W/340 V

<u>Current = 132.35 A</u>

<u>The motor needs to draw 132.35 Amperes current from the battery.</u>

5 0
2 years ago
Other questions:
  • The gravitational force between two objects:
    10·2 answers
  • How many significant figures are there in : (a) 0.000054 (b) 3.001 x 10^5 (c) 5.600
    7·1 answer
  • Help.me on question 3 pls as fast as you can
    7·1 answer
  • How to find current in a series circuit
    10·1 answer
  • Por que todos os gatos domésticos tem o mesmo nome científico
    7·1 answer
  • two equal and unlike parallel forces of magnitude 34N act on a rigid body,such that the moment of couple is 8.50 Nm. calculate t
    12·1 answer
  • Movement of a stationary object it's called what?
    8·1 answer
  • Why do scientists believe that light is made of waves?
    14·1 answer
  • What does electrical energy transform into when used by objects in a home?
    11·2 answers
  • A steel rod has a radius of 10mm and a
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!