All categories

1 year ago

A coin is dropped from a height of 421 m. calculate the velocity of the coin after 3 s

Physics

1 answer:

Keith_Richards [23]1 year ago

7 0

Answer:

29.4 m.s

Explanation:

Vf = vo + at v o = original velocity = 0 in this case

Vf = at

= 9.81 m/s^2 * 3 = 29.4 m/s

You might be interested in

A small remote controlled car with mass 1.60 kg moves at a constant speed of12.0 m/s in a vertical circle with a radius of 5.0 m

kenny6666 [7]

Answer:

61.76 N.

Explanation:

Given the mass of the car, m = 1.60 kg.

The speed of the car, v = 12.0 m/s.

The radius of the circle, r = 5 m.

As car is moving in circular motion, so net force ( normal force + weight of the car) is equal to centripetal force enables the car to reamins in circular path.

Let N is the normal force.

So, $N - mg = F_c$

$N-mg=\frac{mv^2}{r}$

Now substitute the given values, we get

$N-1.60kg\times9.8m/s^2=\frac{1.60kg\times(12.0m/s)^2}{5.0m}$

$N=15.68+46.08$

N = 61.76 N.

Thus, the magnitude ofthe normal force exerted on the car by the walls is 61.76 N.

5 0

3 years ago

how long will it take a car to go from a complete stop to 44 km/h if they are accelerating at 5 kilometers per hour squared

PIT_PIT [208]

44/5 seconds to g<span>o from a complete stop to 44 km/h</span>

8 0

3 years ago

The thickness of a flange on an aircraft component is uniformly distributed between 0.95 and 1.05 millimeters. (a) Determine the

Igoryamba

Answer:

The proportion of flanges that exceeds 0.99 millimeters is 0.6

Explanation:

Given;

integral range of [0.95, 1.05]

Let X be a variable with uniform distribution over the given range.

$Then, f(x) = \frac{1}{1.05 -0.95} =10$

1 - 0.95 = 0.05, 1.05 - 1 = 0.05

$\ minimum, f_(x) = \frac{0.05}{1.05 -0.95} =0.5\\\\$

interval = 10 - 0.5 = 9.5

F(x) = 10x + 9.5

When, X exceeds 0.99 millimeters, then the proportion of flanges will be;

P (X > x) = 1 - F(x)

P( X > 0.99 ) = 1 - 10(0.99) + 9.5

P( X > 0.99 ) = 0.6

Therefore, the proportion of flanges that exceeds 0.99 millimeters is 0.6

8 0

3 years ago

Three resistors of equal resistance are connected in series as shown. Compared to the voltage provided by the battery, voltage a

dsp73

Answer:

the voltage across each resistor is one third of the battery voltage

Explanation:

In a series circuit, the current is constant throughout the circuit, so the battery voltage is equal to the sum of the voltage drop in each part of the series circuit.

V = i (R₁ + R₂ + R₃)

in the exercise indicate that all resistance has the same value

R₀ = R₁ = R₂ = R₃

V = i 3 R₀

V = 3 V₀

V₀ = i R₀

V₀= V / 3

the voltage across each resistor is one third of the battery voltage

6 0

3 years ago

Compare the two circuit diagrams If one of the resistors is turned off (a light bulb goes out), what happens to the other resist

ella [17]

Answer:

it’s C

Explanation:

i just took the test

8 0

2 years ago

A coin is dropped from a height of 421 m. calculate the velocity of the coin after 3 s​

A coin is dropped from a height of 421 m. calculate the velocity of the coin after 3 s