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marshall27 [118]
3 years ago
8

A truck covers 40.0 m in 7.10 s while uniformly slowing down to a final velocity of 2.05 m/s.

Physics
1 answer:
Alona [7]3 years ago
5 0

Answer:

(A) Original speed= 9.22 m/s

(B) Acceleration= -1.0099 m\s^2

Explanation:

A truck covers 40m in 7.10 secs

The truck slows down at a uniform velocity of 2.05 m/s

(A) The original speed can be calculated as follows

Vo= 2(40)/7.10 - 2.05

= 80/7.10 - 2.05

= 11.2676 - 2.05

= 9.22m/s

(B) The acceleration can be calculated as follows

a= Vf-Vo/t

= 2.05-9.22/7.10

= -7.17/7.10

= -1.0099m/s^2

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Thus,
T² = a³
a = ∛(29.46²)
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8 0
3 years ago
1) Write Newton's three laws of motion (20 points). 2) Define acceleration (20 points). 3) Write the Month and Day of the Assign
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Answer:

Hey

I have no idea when YOUR assignment is due.

Newtons 1rst law:

An object that has constant motion will remain at that speed unless acted on by an external force.

Newtons 2nd law:

F=ma (force=mass*acceleration)

Newtons 3rd law:

when a force is applied to an object, there will be an opposite but equal reaction.

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How much your speed increases/decreases per unit of time.

I wrote all that^

4 0
2 years ago
What happens when you mix water and baking soda
AnnZ [28]

Answer:

it explodes

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4 0
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A 2500 kg car enters a curve with a radius of 45 m. If the car is moving at a speed
kompoz [17]

Answer:

ac = 27.22 m/s

Explanation:

ac=v^2/r

m=2500kg

v=35 m/s

Fc=mv^2/r

I'm not sure why you would need mass but I will solve for Fc aswell

Ac=35^2/45 = 1225/45= 27.22 m/s

Fc= 2500(27.22)=68050 N

3 0
2 years ago
A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. The time it takes for the ball to fall halfway t
Naddik [55]

Answer:

1.697s

Explanation:

We use the second equation of free fall under gravity as follows;

h=ut+\frac{1}{2}gt^2...............(1)

Since  the ball fell freely, u = 0m/s, therefore equation (1) reduces to

h=\frac{1}{2}gt^2...............(2)

Given that h is the total height the ball falls through in time t seconds.

However, according to the stated problem the ball falls halfway in 1.2s, this simply implies that the ball falls through a distance of \frac{h}{2} in 1.2s. Hence we can write the following, given that g=9.8m/s^2;

\frac{h}{2}=\frac{1}{2}*9.8*1.2^2\\hence\\h=9.8*1.2^2\\h=14.112m

We can now proceed to find the time t for which it falls through h = 14.112m as follows;

14.112=\frac{1}{2}*9.8*t^2\\14.112=4.9t^2\\t^2=\frac{14.112}{4.9}\\t^2=2.88\\t=\sqrt{2.88} \\t=1.697s

8 0
3 years ago
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