The maximum tension that a 0.80 m string can tolerate is 15 N. A 0.35-kg ball attached to this string is being whirled in a vert
1 answer:
Answer:
v=5.86 m/s
Explanation:
Given that,
Length of the string, l = 0.8 m
Maximum tension tolerated by the string, F = 15 N
Mass of the ball, m = 0.35 kg
We need to find the maximum speed the ball can have at the top of the circle. The ball is moving under the action of the centripetal force. The length of the string will be the radius of the circular path. The centripetal force is given by the relation as follows :
v is the maximum speed
Hence, the maximum speed of the ball is 5.86 m/s.
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Complete Question:
Check the file attached to get the complete question
Answer:
In the film Ice word Revenge, vehicle 2 did not fall of the cliff because, but in Claire's test, vehicle 2 off the cliff because
Explanation:
In Claire's test, the weight of vehicle 1 is either equal to or greater than the weight of vehicle 2, so it was sufficient to push it down the cliff. In the film Ice word revenge, the weight of vehicle 1 is less than the weight of vehicle 2, it is not sufficient to make it fall off the cliff ( Note: Looking exactly the same in the movie, as Claire claimed, does not mean they have the same mass). Therefore if Claire wants a collision that will not make the vehicle 2 fall off the cliff, he should collide it with a vehicle of lesser mass/weight.
Objects having both kinetic and potential energy:
water flowing downstream
a child swinging on a swing
a bouncing ball
a plane in flight at 30,000 feet
Explanation:
The kinetic energy of an object is the energy possessed by the object due to its motion. It is given by
where
m is the mass of the object
v is its speed
Therefore, an object has kinetic energy when its speed is non-zero (so, whenever it is moving).
The potential energy of an object is the energy possessed by the object due to its position in the gravitational field. It is given by
where
m is the mass
g is the acceleration of gravity
h is the heigth of the object relative to the ground
Therefore, an object has potential energy whenever it is located at a certain height above the ground.
So in this problem, the objects that have both kinetic and potential energy are:
a rock at the edge of a cliff --> NO, because the rock is at rest (so KE = 0)
water flowing downstream --> YES, because the water is moving AND it is at a certain height above the ground
a child swinging on a swing --> YES, because the child is moving AND it is at a certain height above the ground
a bouncing ball --> YES, because the ball is moving AND it is at a certain height above the ground
water behind a dam --> NO, because the water is at rest (so KE=0)
a car moving on a level road --> NO, because the car is at ground level (so PE=0)
a plane in flight at 30,000 feet --> YES, because the plane is moving AND it is at a certain height above the ground
a compressed spring --> NO, because the spring is at rest (so KE=0)
Learn more about kinetic and potential energy:
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Answer:
(C) 16 radians
Explanation:
The angular displacement is given by the following equation:
Here
Is the angular displacement of the body at the indicated time (t).
Is the angular velocity of the body at the initial moment.
Is the angular acceleration of the body.
The disk starts from rest, so
Replacing the given values: