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
pogonyaev
3 years ago
14

An object is falling from a height of 7.5 meters. At what height will it’s velocity be 7 meters/second?

Physics
1 answer:
Nady [450]3 years ago
6 0
One of the equations of gravity is this:
{v}^{2} = {u}^{2} + 2gh
Where v = final velocity which is 7m/s
u = initial velocity which is 0 for objects falling from a height
g = acceleration due to gravity and it is approximately 10m/s^2. It's a constant so pretty much remember this number. It's positive since the work being done is caused by gravity (in other words, it's falling down). It can also be negative if the work being down is against gravity (in other words, it's going up)
h = height of object

Substitute for the values and you should have something like this
{7}^{2} = {0}^{2} + 2 \times 10 \times h
49 = 0 + 20h
h = \frac{49}{20}
h = 2.5m
You might be interested in
Which of the graphs describes the motion of a person who first rode her bicycle at constant speed and then rested?
sergeinik [125]

Answer:

Its graph 1

Explanation:

She started at the origin and kept riding her bike until she stopped which causes the line to go staright because she's not moving.

5 0
2 years ago
How has technology influenced theories over time?
Contact [7]
Better technology is helping us because we can see more stuff like the microscope we able to make assumptions based on what we saw.  
7 0
3 years ago
Any one tell me about the earth rotation it rotatining or not with any proof? ​
Dafna11 [192]
The proof that the earth is rotating is the happens of night and day also the seasons, eg. winter, summer, autumn.
6 0
3 years ago
A car travels a distance of 98 meters in 10 seconds. What is the average speed of the car?
stira [4]

Answer:

C

Explanation:

4 0
3 years ago
Read 2 more answers
A torque of 0.77 N⋅m is applied to a bicycle wheel of radius 30 cm and mass 0.70 kg
Naddik [55]

Answer:

α = τ/I = 0.77 / (0.70(0.30²)) = 12.22222... = 12 rad/s²

Explanation:

4 0
3 years ago
Other questions:
  • An ice rescue team pulls a stranded hiker off a frozen lake by throwing him a rope and pulling him horizontally across the essen
    13·1 answer
  • A _________ is a satellite or other spacecraft designed to explore space and transmit data back to Earth.
    8·2 answers
  • 20 POINTS MULTIPLE CHOICE
    14·1 answer
  • 5750 milliliters converted to Liters
    9·2 answers
  • A free body diagram can be used to help work out the net force acting on an object. True or, false?
    15·1 answer
  • Tina just threw a 0.15 kg ball straight up in the air. If the ball reaches
    11·1 answer
  • What is the difference <br> between interplanting and intercropping?
    12·1 answer
  • Se lanza hacia arriba un objeto con una velocidad de 72 Dam/min y al mismo tiempo se deja caer una pelota desde una altura de 32
    10·2 answers
  • Most houses in the countries that experience winter have air heaters installed.These heaters are usually installed near the floo
    12·1 answer
  • True or False - Auroras appear when the particles collide with atoms and
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!