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
drek231 [11]
2 years ago
7

A physics student stands on a cliff overlooking a lake and decides to throw a softball to her friends in the water below. She th

rows the softball with a velocity of 21.5 m/s at an angle of 33.5∘ above the horizontal. When the softball leaves her hand, it is 13.5 m above the water. How far does the softball travel horizontally before it hits the water?
Physics
1 answer:
aliina [53]2 years ago
3 0

Answer:

58.5 m

Explanation:

First of all, we need to find the total time the ball takes to reach the water. This can be done by looking at the vertical motion only.

The initial vertical velocity of the ball is

u_y = u sin \theta

where

u = 21.5 m/s is the initial speed

\theta=33.5^{\circ} is the angle

Substituting,

u_y = (21.5) sin 33.5^{\circ} =11.9 m/s

The vertical position of the ball at time t is given by

y = h + u_y t + \frac{1}{2}gt^2

where

h = 13.5 m is the initial heigth

g = -9.8 m/s^2 is the acceleration of gravity (negative sign because it points downward)

The ball reaches the water when y = 0, so

0 = h + u_yt +\frac{1}{2}gt^2\\0 = 13.5 +11.9 t - 4.9t^2

Which gives two solutions: t = 3.27 s and t = -0.84 s. We discard the negative solution since it is meaningless.

The horizontal velocity of the ball is

u_y = u cos \theta = (21.5) cos 33.5^{\circ} =17.9 m/s

And since the motion along the horizontal direction is a uniform motion, we can find the horizontal distance travelled by the ball as follows:

d= u_x t = (17.9)(3.27)=58.5 m

You might be interested in
Compare the strong and weak megnetic field
garri49 [273]
The strong magnetic fields is Long rang attractive power Reuther then week magnetic field.
7 0
3 years ago
If a rock has a weight of 30 N on Earth, would its weight be more or less if it was on Jupiter (gravity on Jupiter = 25 m/s2)?
goldenfox [79]
I’m sorry this is not going as planned
8 0
3 years ago
A ball bounces on the ground. How do the ball and the ground act on each other?(1 point)
liubo4ka [24]

Answer: A is your best answer.

Explanation:

It should be A because the when the ball bounces on the ground the ground will give it force to bounce again but also it wont go as high as it first did. Hope this helps:))

3 0
2 years ago
Read 2 more answers
Trick question (really easy) just for fun! If u get this right u get brainliest!
Maurinko [17]

Answer:

piper duh

Explanation:

6 0
2 years ago
Read 2 more answers
Can yall please help me with this?
Lostsunrise [7]

Answer: b

Explanation:

B is a chemical property

Reference what are physical properties

And what are chemical properties

Under certain conditions it can release a gas is the key words letting you know this is a chemical property

8 0
3 years ago
Other questions:
  • Which best describes the relationship between population size, carrying capacity, and limiting factors?
    5·2 answers
  • As a crate slides down an inclined rough surface, its total mechanical energy A) increases, B) might decrease or increase depend
    11·1 answer
  • Consider the two-body system at the right. A 22.7-N block is placed upon an inclined plane which is inclined at a 17.2 degree an
    10·1 answer
  • Bandwidth is the: Select one: A. number of frequencies that can be broadcast through a medium. B. number of cycles per second th
    8·1 answer
  • After being struck by a bowling ball, a 1.7 kg bowling pin sliding to the right at 3.8 m/s collides head-on with another 1.7 kg
    8·1 answer
  • The diagram shows monochromatic light passing through two openings.
    15·1 answer
  • A 5 kg ball travels at a velocity of 10 m/s, what is the momentum of the ball
    12·2 answers
  • What is the root cause of earths magnetic field?
    15·1 answer
  • The two blocks are connected by a light string that passes over a frictionless pulley with a negligible mass. The 2 kg block lie
    5·1 answer
  • Which statement best defines work? (2 points) Group of answer choices
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!