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OLEGan [10]
3 years ago
9

A motorcycle is traveling east at a rate of 56mph.it take 6.7 s for it to decrease its speed to 35mph. How far does the motorcyc

le travel in 6.7 s if it slows at a constant acceleration? Remeber 1 mile equals 5280 ft.
Physics
1 answer:
Phantasy [73]3 years ago
8 0
Initial speed = 56mph
Final speed = 35mph

Time taken = 6.7seconds...

Converting the time to hour.. Divide by 3600..
= 6.7/3600

=0.00186hour..

Acceleration = v-u/t

a = 35-56/0.00186
a = -11283.6mph²

The negative sign shows that it decelerated...

V² = u²+2as

(35)² = (56)² + 2×-11283.6×s
Where s is the distance covered within that time...

1225 = 3136 - 22567.2s

22567.2s = 3136-1225

22567.2s = 1911

S = 1911/22567.2

S = 0.08468miles...

But at the end of the question we were made to understand that 1miles = 5280ft

Therefore 0.08468miles = (0.08468×5280)ft

= 447. 11feets...

Which is approximately 447ft.....


Hope this helped.... ?
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Answer:

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Explanation:

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F_v = q·E

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q·E =  -4.606 × 10⁻¹⁴ N

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The excess charge, q ≈ -1.439375 × 10⁻¹⁸ C

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The number of excess electrons in the droplet, n, is given as follows;

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