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4 years ago

Is this right at all

Physics

1 answer:

Alja [10]4 years ago

7 0

It is correct! good job :)

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A tennis ball, a bowling ball, and a feather are dropped from the top of a tall building at the same time. Consider what you hav

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The object that reaches the ground first is thebowling ball i think because it weighs heavier but when the tennis ball hits the ground it will bounce again and again till it stops and the bowling ball will just stop it wont bounce

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3 years ago

Explain why Earth stays in constant rotation.

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3 years ago

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Four water levels are shown

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3 years ago

Read 2 more answers

A wire that is 0.86 meters long is moved perpendicularly through a constant magnetic field of strength 0.035 newtons/amp·meter a

GaryK [48]

The emf induced = B*l*v where B is the flux density, l the length of the conductor and v the velocity of the conductor. In the given case B = 0.035 N/amp.meter, l = 0.86 and v = 6 m/sec
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3 years ago

You are driving to the grocery store at 18 m/sm/s. You are 160 mm from an intersection when the traffic light turns red. Assume

inysia [295]

Answer:

part(a) 151 m

part(b) 1.073 m/s2

part(c) 16.7 secs

Explanation:Firstly the person applied brakes 0.5 secs after seeing the red light hence the distance traveled during this time is

d=v*t

d=18*0.5

d=9m

For part (a)

I have corrected this question and now

The person was 160m from the intersection before applying the brakes as he traveled 9m before the brakes

He is now 151 m from intersection as

s=160-9

s= 151 m

part (b)

As it is given that velocity of the car is 0 at the intersection so we use this information in kinematic equation

$v^2=u^2+2as$

here u=18m/s and s=151

$0=18^2+2a*151\\302a=-324\\a=-1.073 m/s^2$

To calculate time we can use the acceleration equation

$a=\frac{v-u}{t} \\t=\frac{v-u}{a}\\t=18/1.073\\t=16.77 secs$

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3 years ago