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goblinko [34]
3 years ago
7

Ignoring air resistance, if you throw a baseball from first base upwards toward a friend in left field, and the baseball leaves

your hand at a speed of 15 meters per second, how fast will the ball be going when your friend catches it? A. 15 m/s B. less than 15 m/s C. more than 15 m/s D. It would depend on the distance the friend is from you.
Physics
2 answers:
larisa86 [58]3 years ago
4 0

Answer:

A: 15 m/s

Explanation:

If air resistance was not there, then the ball would not stop moving unless your friend, gravity, and the ground catches it.

Trava [24]3 years ago
4 0
A) 15 m/s HOPE THAT HELPS!
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A 600-kg car traveling at 30.0 m/s is going around a curve having a radius of 120 m that is banked at an angle of 25.0°. The coe
andrey2020 [161]

Answer:

The magnitude of force is 1593.4N

Explanation:

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fcostheta + Nsintheta = mv^2/r

Where F = force of friction

Theta = angle of banking

N = normal force

m = mass of car

v = velocity of car

r = radius of curve

The car has no motion in the vertical direction so the sum of forces = 0

The vertical component of the normal force acts upwards whereas the weight of the car and the vertical component friction acts downwards.

Taking the upward direction to be positive,rewrite the equation above to get:

Ncos thetha = mg - fsintheta =0

Ncistheta = mg + fain theta

N = mg/cos theta + sintheta/ costheta

fcostheta +[mg/costheta + ftan theta] sin theta = mv^2/r

Substituting gives:

f = (1/(costheta + tanthetasintheta) + mgtantheta = mv^2/r - mgtantheta)

Substituting given values into the above equation

f = 1/(cos25 + tan 25 )(sin25)[ 600×30/120 - (600×9.81)tan

f = 1593.4N25

4 0
3 years ago
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A child sits 1.6 m from the center of a merry go round that makes one complete revolution in 4.7 s. What is his angular accelera
olga2289 [7]

Answer: angular acceleration = 2.86\ rad/sec^{2}

Given:

Distance from center of axis = 1.6 m

Time taken to complete one revolution = 4.7 sec

Therefore, we can evaluate the angular acceleration using the following formula:

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\alpha = r\times (\frac{2\pi}{T})^{2}

\alpha = 1.6\times (\frac{2\times3.14}{4.7})^{2}

\alpha = 2.86\ rad/sec^{2}

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3 years ago
VELOCITY, SPEED, DISTANCE ETC..
vaieri [72.5K]

Answer:

Explanation:

Speed = distance / time

Velocity  = displacement / time

So ,

Speed = 50 km / 0.5 hr = 100 km/h

Velocity  = 40 km / 0.5hr = 80 km/h

4 0
2 years ago
Select all the correct ANSWERS.
MissTica
The ground exerts an equal force on the golf ball.
3 0
3 years ago
Friction is just hot air rubbing off on the inevitable force of solid<br><br>prove me wrong
algol13

Answer:

lol ur not wrong

Explanation:

8 0
3 years ago
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