3 years ago

If Sean traveled 7 blocks in 200 seconds and each block is 150 meters. What is his velocity?

Physics

1 answer:

valentinak56 [21]3 years ago

3 0

Answer:

5.25

Explanation:

tell me if u need an explanation

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hammer [34]

For the first question, you got them right, for the two you left blank, initial(beginning) velocity: 2 m/s the final velocity is: 12 m/s

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What picture of the electron is suggested by the quantum-mechanical model of the hydrogen atom? a. a raisin in pudding c. a plan

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3 years ago

A 12.0-g bullet is fi red horizontally into a 100-g wooden block initially at rest on a horizontal surface. After impact, the bl

allochka39001 [22]

Answer:

$v_1 = 91.3 m/s$

Explanation:

By energy conservation and work energy theorem we can say that after bullet hits the block, it will move on the rough floor and comes to rest

so here work done by frictional force = change in kinetic energy

so we know that

$W_f = \frac{1}{2}mv_f^2 - \frac{1}{2}mv_i^2$

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$v = 9.78 m/s$

now by momentum conservation we have

$m_1 v_1 = (m_1 + m_2) v$

$12 v_1 = (100 + 12) 9.78$

$v_1 = 91.3 m/s$

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3 years ago

What affects the vertical velocity of a projectile over time?<br>---

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A 20 gram bullet exits the rifle at a speed of 985 m/s. The gun barrel is 0.8 m long. What

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