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yanalaym [24]
3 years ago
12

THIS IS DUE IN 5 MINUTES IM BEGGING YOU PLEASE ANSWER

Physics
1 answer:
Archy [21]3 years ago
4 0

Answer:

the answer is A or 900

Explanation:

what u have to do is add all the forces together and then u get ur answer.

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Which of the following can be explained with science? A.Plant growth B.Career options C.Moral value D.Meaning of life
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A car with a mass of 800 g and velocity of 15 m/s collided with a truck of a velocity of 20 m/s, if the momentum is conserved wh
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Question: A car with a mass of 800 g and velocity of 15 m/s collided with a truck moving in opposite direction with a velocity of 20 m/s, if the momentum is conserved and they both move with a common velocity of 10 m/s, what is the mass of the truck?

Answer:

0.133 kg

Explanation:

Applying the law of conservation of momentum,

Total momentum before collision = Total momentum after collision

mu+m'u' = V(m+m')................... Equation 1

Where m = mass of the car, m' = mass of the truck, u = initial velocity of the car, u' = initial velocity of the truck, V = common velocity.

From the question,

Given: m = 800 g = 0.8 kg, u = 15 m/s, u' = -20 m/s, V = 10 m/s

Substitute these values into equation 2

(0.8*15)+(m'*20) = 10(0.8+m')

Solve for m'

12-20m' = 8+10m'

-20m'-10m' = 8-12

-30m' = -4

m' = -4/-30

m' = 0.133 kg

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A pendulum has a period of 1.69 s on earth. what is its period on mars, where the acceleration of gravity is about 0.37 that on
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The formula for the period of the pendulum is
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Labeling with E the Earth and with M Mars, we can write the period of the pendulum on Earth as
T_E = 2 \pi  \sqrt{ \frac{L}{g_E} }
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T_M = 2 \pi  \sqrt{ \frac{L}{g_M} }

if we calculate the ratio, we get
\frac{T_M}{T_E}=  \sqrt{ \frac{g_E}{g_M} }
but we know that the gravitational acceleration on Mars is 0.37 times the gravitational acceleration on Earth:
g_M = 0.37 g_E
Substituting into the formula, we find
\frac{T_M}{T_E}= \sqrt{ \frac{1}{0.37} }=1.64
And so, the period of the pendulum on Mars is
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