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
WITCHER [35]
3 years ago
12

A boy drops a ball from an observation tower. The ball hits the ground in 5.0 s. What is the ball's velocity at the time of impa

ct?
A. 0 m/s
B. 98 m/s
C. 49 m/s
D. 123 m/s
Physics
1 answer:
Orlov [11]3 years ago
7 0
The answer is <span>C. 49 m/s

The kinetic equation is:
v2 = v1 + a * t

v1 - initial velocity
v2 - final velocity
a - gravitational acceleration
t - time

We know:
v2 = ?
v1 = 0 (in free fall
a = 9.8 m/s
t = 5

</span>v2 = v1 + a * t
v2 = 0 + 9.8 * 5
v2 = 0 + 49
v2 = 49 m/s
You might be interested in
The crust is composed primarily of basalt and _____________.
german

Answer:

Granite

Explanation:

Trust me I learned this 2years ago

3 0
2 years ago
Does sand stay sand forever?
Gemiola [76]

Answer:

No sand doesn't stay sand forever.

Explanation:

  • We may have a thought that the sand we see on the beach areas are always the same one for eternal, but it is not true.
  • Due to different activities like beach nourishment, sand replenishment etc. the sand in the beach areas are changed and replaced.
  • If the sand remained there for long time, it also affects the sand eating organisms and plants.
3 0
3 years ago
A wheel rotates clockwise 6 times per second. What will be its angular displacement after 7 seconds? Answer should be rounded to
solong [7]

Answer:

The frequency of the wheel is the number of revolutions per second:

f= \frac{N_{rev}}{t}= \frac{10}{1 s}=10 Hz  

And now we can calculate the angular speed, which is given by:

\omega = 2 \pi f=2 \pi (10 Hz)=62.8 rad/s in the clockwise direction.

Explanation:

5 0
3 years ago
Read 2 more answers
Helpppppppppppp meeeeeeeeeeeeeeeee
Trava [24]

kinetic energy to gravitational potential energy

6 0
3 years ago
Read 2 more answers
A magnetic field is perpendicular to the plane of a flat coil. Since the magnitude of the field is increasing, an emf will be in
Blababa [14]

Answer:

D) Reduce the time interval during which the magnitude of the field increases.

6 0
2 years ago
Other questions:
  • Which of the following statements is true? The atmosphere is an example of a solution. In a glass of sugar water, sugar is the s
    5·2 answers
  • What is the proper function of a linkage? *
    6·1 answer
  • True or false kinetic energy increases if the speed or the mass of an object increases
    5·2 answers
  • Why does the number of cooling fins effect the rate of energy transfer from a radiator?
    14·1 answer
  • Define orbital velocity
    9·1 answer
  • A given 60uc piont charge located at origion
    13·2 answers
  • As a prank, your friends have kidnapped you in your sleep, and transported you out onto the ice covering a local pond. When you
    10·1 answer
  • Help 30 points and willgive brainliest
    12·1 answer
  • An inclined plane creates a mechanical advantage of 5. What would the input force need to be to create an output force of 20 N?
    12·1 answer
  • Which is TRUE about static electricity?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!