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3 years ago

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fired, the ball moves 15.9 cm through the horizontal barrel of the cannon, and the barrel exerts a constant friction force of 0.

032 8 N on the ball. (a) With what speed does the projectile leave the barrel of the cannon

1 answer:

sergeinik [125]3 years ago

6 0

Answer:

Explanation:

Where is the remaining part of the question? This is a very easy one

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Anakin Skywalker's pod racer has a mass of 450 kg. If the top speed of this racer is 947

andriy [413]

Answer:

15,569,653.3 Joules(J)

Explanation:

The equation used to find Kinetic Energy (KE) is

KE = $\frac{1}{2}$ m $v^{2}$

You have been given

m = 450kg

v = 947km/h

KE = ???

Firstly, we need to convert the km/h into m/s as this is the unit used in the KE equation

This can be done by dividing by 3.6

947km/h = 263.056m/s

Substitute you values into the equation

KE = $\frac{1}{2}$ m $v^{2}$

KE = $\frac{1}{2}$ * 450 * $263.056^{2}$

KE = 15,569,653.3 Joules(J)

Round your answer as appropriate

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3 years ago

What is the average velocity in m/y of a tectonic plate that has traveled 9000 km to the south in 60 million years

alexandr402 [8]

9,000,000 ÷ 60,000,000 = 0.15m/y

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3 years ago

A (hypothetical) large slingshot is stretched 4.00 m to launch a 440 g projectile with speed sufficient to escape from Earth (11

RSB [31]

Answer:

(A) 3,449,600 N/m

(B) 62,720 poeple

Explanation:

extension of the sling shot (e) = 4 m

mass of projectile (m) = 440 g = 0.44 kg

speed of projectile (v) = 11.2 km/s = 11,200 m/s

average force a person can exert = 220 N

spring constant (k) = ?

(A) When all the elastic potential energy is converted to kinetic energy

$o.5ke^{2} = 0.5 mv^{2}$

rearranging the above equation

spring constant (K) = $\frac{0.5mv^{2} }{0.5e^{2}}$

spring constant (K) = $\frac{0.5x0.44x11,200^{2} }{0.5x4^{2}}$

spring constant (K) = $\frac{27,596,800}{8}$

spring constant (K) = 3,449,600 N/m

(B) force required to stretch the slingshot (F) = ke = 3,449,600 x 4 = 13,798,400 N

number of people required = required force / average force per person = 13,798,400 / 220 =62,720 poeple

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3 years ago

Brain wave stages from waking to sleeping states

Dmitry_Shevchenko [17]

NREM stage 1
NREM stage 2
NREM stage 3
REM sleep
hope this helps

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What is the wave speed of a wave that has a frequency of 100 Hz and a wavelength of 0.50 m?

Nimfa-mama [501]

Wave speed of a wave = wave length * frequency

0.50 m * 100 Hz = 50 m/s

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3 years ago

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