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Papessa [141]
3 years ago
14

A 1.0 kg object is attached to a string 0.50 m. It is twirled in a horizontal circle above the ground at a speed of 5.0 m/s.

Physics
1 answer:
zysi [14]3 years ago
6 0

Answer: d

Explanation:

For an object to move in a uniform circular motion, only force that acts on it is the centripetal force which acts along the line joining the object and center of the circular path. The acceleration also acts in the direction of force. The centripetal acceleration acts along the radius of the circular motion path.

In the given horizontal circle, the direction of the acceleration of the object points towards d.

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How far (in feet) could a pitcher throw a baseball on flat, level ground if he can throw it at 100mph? (Neglect wind drag and th
ehidna [41]

Answer:

R = 668.19 ft  

Explanation:

given,

speed of the ball thrown by the pitcher = 100 mph

to travel maximum distance θ = 45°

distance traveled by the ball = ?

using formula

1 mph = 0.44704 m/s

100 mph = 44.704 m/s

R = \dfrac{u^2sin2\theta}{g}

R = \dfrac{44.704^2sin2\times 45}{9.81}

R = 203.71 m

1 m  = 3.28 ft

R = 203.71 × 3.28

R = 668.19 ft  

hence, ball will go at a distance of 668.19 ft   when pitcher throw it at 100 mph.

6 0
3 years ago
Which planet moves the fastest and which planet moves slowest? a, b, c, d, e, or f. Explain
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D is the point where the planet moves the fastest. This is because it is in the perihelion, where the planet is moving at it’s fastest pace
6 0
2 years ago
A general definition of media is "methods for communicating information." Please select the best answer from the choices provide
igor_vitrenko [27]

Answer:

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6 0
4 years ago
Consider an object sliding at constant velocity along a frictionless surface. Which of the following best describes the forces o
Aliun [14]
-- The net vertical force on the object is zero.
Otherwise it would be accelerating up or down.

-- The net horizontal force on the object is zero.
Otherwise it would be accelerating horizontally,
that is, its 'velocity' would not be constant.  That
would contradict information given in the question.

The total net force on the object is the resultant of the
net vertical component and net horizontal component.

Total net force =  √(0² + 0²)

                         =  √(0 + 0)

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The correct answer is the last choice on the list.

Also, you know what ! ?  It doesn't even matter whether the surface it's
sliding on is frictionless or not. 

If the object's velocity is constant, then the NET force on it must be zero. 
If it's sliding on sandpaper, then something must be pushing it with constant
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net force isn't zero, then the object would have to be accelerating ... either
its speed, or its direction, or both, would have to be changing.
3 0
3 years ago
9. Two moving objects will change their motion if which of the following is true? a.There is no friction on the objects. b. The
adoni [48]

Answer:

lol

Explanation:

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