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blsea [12.9K]
3 years ago
5

A roller coaster is released from the top of a track that is 125 m high. Find the rollar coaster speed when it reaches ground le

vel.​
Physics
1 answer:
astra-53 [7]3 years ago
6 0

Explanation:

A roller coaster is released from the top of a track that is 125 m high. Find the roller coaster speed when it reaches ground level. 75. A 1500 kg car, moving at a speed of 20 m/s comes to a halt. How much work was done .

<h3><u>HOPE </u><u>IT </u><u>HELPS</u><u /><u /></h3>

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ball of mass 0.4 kg is attached to the end of a light stringand whirled in a vertical circle of radius R = 2.9 m abouta fixed po
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Answer:

6.046N

Explanation:

The net force exerted on the mass is the sum of tension force and the external force of gravity.

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From the net force equation above:

F_t=F_n_e_t-F_g\\=mv^2/r-mg\\=0.4\times(8.5^2/2.9)-0.4\times9.8\\=6.046N

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