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3 years ago

Which vector correctly indicates the direction of centripetal acceleration experienced by the car?

Physics

1 answer:

Viktor [21]3 years ago

4 0

Answer:

where is the answers ??

is there any answer called upward pointing arrow .

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A football quarterback runs 15.0 m straight down the playing field in 3.00 s. He is then hit and pushed 3.00 m straight backward

algol [13]

Answer:

a) $v_{1}=14.29m/s\\v_{2}=9.25m/s\\v_{3}=6.36m/s$

b) $v=+9.97m/s$

Explanation:

From the exercise we know that

$x_{1} =15m, t_{1}=3s$

$x_{2} =-3m, t_{1}=1.74s$

$x_{3} =29m, t_{3}=5.20s$

From dynamics we know that the formula for average velocity is:

$v=\frac{x_{2}-x_{1} }{t_{2}-x_{1} }$

a) For the three intervals:

$v_{1}=\frac{x_{2}-x_{1} }{t_{2}-t_{1} }=\frac{(-3-15)m}{(1.74-3)s}=14.29m/s$

$v_{2}=\frac{x_{3}-x_{2} }{t_{3}-t_{2} }=\frac{(29-(-3))m}{(5.20-1.74)s}=9.25m/s$

$v_{3}=\frac{x_{3}-x_{1} }{t_{3}-t_{1} }=\frac{(29-15)m}{(5.20-3)s}=6.36m/s$

b) The average velocity for the entire motion can be calculate by the following formula:

$v=\frac{v_{1}+v_{2}+v_{3} }{n} =\frac{(14.29+9.25+6.36)m/s}{3}=+9.97m/s$

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3 years ago

What do waves transmit? (Points : 1)

Mamont248 [21]

Energy

Waves carry energy as they travel.

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Rewrite the false statements correctly

FrozenT [24]

Explanation:

1. if an object sjnks in one liquid and floats on another liquid it implies that the density of second liquid is greater than the density of first liquid

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3 years ago

When Earth receives energy from the Sun, ____.

Sindrei [870]

d. all of the above

All of the above definitely happens when Earth receives energy from the Sun.

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A machinist turns the power on to a grinding wheel, which is at rest at time t = 0.00 s. The wheel accelerates uniformly for 10

Sergeeva-Olga [200]

I have some notes here that might help you answer the problem on your own:

α = dω / dt

Angular acceleration is derivative of angular velocity the same way as linear acceleration is derivative of linear velocity
a = dv / dt

I hope my answer has come to your help. God bless and have a nice day ahead!

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4 years ago

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