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vfiekz [6]
3 years ago
15

How far does a car in 90 sec if it is traveling at a speed of 55m/s show equation

Physics
1 answer:
Mkey [24]3 years ago
5 0

Answer:

4950 meters

Explanation:

Recall that the formula for the speed (v) is given by the quotient of the distance traveled (d)  divided by the time (t) it took to cover that distance:

v=\frac{d}{t}

Therefore, for this case in which the car travels at 55 m/s for 90 seconds, we can replace these values in the formula, and solve for the distance covered:

v =\frac{d}{t} \\55 \frac{m}{s} =\frac{d}{90\,s} \\d=55*90 m\\\\d=4950\,m

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A toy rocket launcher can project a toy rocket at a speed as high as 35.0 m/s.
Anestetic [448]

Answer:

(a) 62.5 m

(b) 7.14 s

Explanation:

initial speed, u = 35 m/s

g = 9.8 m/s^2

(a) Let the rocket raises upto height h and at maximum height the speed is zero.

Use third equation of motion

v^{2}=u^{2}+2as

0^{2}=35^{2}- 2 \times 9.8 \times h

h = 62.5 m

Thus, the rocket goes upto a height of 62.5 m.

(b) Let the rocket takes time t to reach to maximum height.

By use of first equation of motion

v = u + at

0 = 35 - 9.8 t

t = 3.57 s

The total time spent by the rocket in air = 2 t = 2 x 3.57 = 7.14 second.

8 0
3 years ago
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Lady_Fox [76]

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Pressure is force per unit area.

8 0
3 years ago
The collision between two objects is an example of a___force.
irga5000 [103]
The collision between two objects is an example of a contact force
5 0
3 years ago
What is the volume of an object if it has a mass of 10 grams and a density of 87 g/ml
belka [17]

Answer:

<h3>The answer is 0.115 mL</h3>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

volume =  \frac{mass}{density} \\

From the question

mass = 10 g

density = 87 g/ml

We have

volume =  \frac{10}{87}  \\  = 0.114942528...

We have the final answer as

<h3>0.115 mL</h3>

Hope this helps you

5 0
3 years ago
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