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
Vinvika [58]
3 years ago
6

A basketball player is running at 4.80 m/s directly toward the basket when he jumps into the air to dunk the ball. He maintains

his horizontal velocity. (a) What vertical velocity (in m/s) does he need to rise 0.650 meters above the floor? _______m/s (b) How far (in m) from the basket (measured in the horizontal direction) must he start his jump to reach his maximum height at the same time as he reaches the basket?_______m
Physics
1 answer:
Levart [38]3 years ago
7 0

Answer:

a) 3.56m/s

b) 1.73m

Explanation:

We have to treat this as a parabolic motion problem:

we will use the next formulas:

V=Vo+a*t\\Vy^2=Vyo^2+2*a*Y\\X=Vox*t

we first have to calculate the initial velocity of the basketball player:

Vy^2=Vyo^2+2*a*Y\\0^2=Vyo^2+2*(-9.8)*(0.650)\\Vyo=\sqrt{2*9.8*0.650} \\Vyo=3.56 m/s

the final velocity is zero when he reaches the maximun height.

To answer the second part we need to obtain the time to reach the maximun height, so:

V=Vo+a*t\\\\0=3.56+(-9.8)*t\\t=0.36 seconds

Now having that time, let's find the distance on the X axis, the X axis behaves as constant velocity movement, so:

X=Vox*t\\X=4.80*0.36\\X=1.73m

You might be interested in
A skateboarder has an acceleration of −1.9 m/s2. If her initial speed is 6 m/s, how long does it take her to stop?
SSSSS [86.1K]
You said that she's losing 1.9 m/s of her speed every second.

So it'll take

             (6 m/s) / (1.9 m/s²)  =  3.158 seconds  (rounded)

to lose all of her initial speed, and stop.
6 0
3 years ago
How to find resultant force?​
lys-0071 [83]

Assuming you're working in a 3D cartesian coordinate system, i.e. each point in space has an x, y, and z coordinate, you add up the forces' x/y/z components to find the resultant force.

8 0
3 years ago
The submarine emits a pulse of sound to detect other objects in the sea. The sped of sound in sea water is 1500m/s. An echo is r
r-ruslan [8.4K]

Answer:

d = 375 m

Explanation:

The speed of sound is constant in any medium, therefore we can use the uniform motion relationships

          v = x / t

          x = v t

In this case it indicates that the time since the sound is emitted and received is t = 0.50 s, in this time the sound traveled a round trip distance

           x = 2d

          2d = v t

          d = v t/2

     

let's calculate

          d = 1500 0.5 / 2

          d = 375 m

3 0
3 years ago
You have an electrically neutral toy that you divide into two pieces. You notice that at least one of those pieces has an electr
den301095 [7]

Answer:

The pieces will attract one another

Explanation:

From the law of conservation of energy, we know that energy can neither be created nor destroyed, but transformed. If one piece of the toy that was neutral ends up having an electric charge (positive or negative), from the conservation of energy, the other piece must have a charge opposite to that on the other charged piece but equal in magnitude. These two pieces which are oppositely charged attracts each other, this shows that electric charge is conserved.

8 0
3 years ago
What is the speed of a car that<br> accelerates at a rate of 10 m/s2 for a<br> total of 25 seconds?
jeyben [28]

Answer:

<h2>250 m/s</h2>

Explanation:

The speed of the car can be found by using the formula

<h2>v = a × t</h2>

where

a is the acceleration

v is the speed

t is the time

From the question we have

v = 10 × 25

We have the final answer as

<h3>250 m/s</h3>

Hope this helps you

5 0
3 years ago
Other questions:
  • Which workout schedule would be BEST suited for a weight-lifting workout that builds both strength and endurance
    6·2 answers
  • Calculate the acceleration of a skier heading down a 10.0º slope, assuming the coefficient of friction for waxed wood on wet sno
    15·1 answer
  • An electric motor is connected to a battery. The current flows through brushes to a commutator ring, which is attached to an ele
    15·2 answers
  • What is terminal speed? When a skydiver has reached terminal speed, what is the are resistance equal to? What is the skydiver’s
    6·2 answers
  • Weight is a force that depends on mass and ?
    9·1 answer
  • If an upstairs room is warmer than downstairs, is that a example of convection, conduction, or radiation?
    14·1 answer
  • The most common type of dam is an impoundment hydroelectric plant, which consists of a dam across a river, and a reservoir (lake
    7·1 answer
  • slader A baseball player slides to a stop on level ground. Using energy consideration, calculate the distance the 65 kg baseball
    8·1 answer
  • A ride-sharing car moving along a straight section of road starts from rest, accelerating at 2.00 m/s2 until it reaches a speed
    15·1 answer
  • A crate of mass 50kg is pushed along a floor with a force of 20N for a distance of
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!