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Paraphin [41]
3 years ago
13

What is the equations to prove the answer is A?

Physics
1 answer:
Pepsi [2]3 years ago
7 0

Explanation:

Let's say your mass is M, the ball's mass is m, and the ball's speed is v.  Let's say your final speed is V.

Momentum is conserved.  If you catch the ball, your speed is:

mv = (m + M)V

V = mv / (m + M)

If you deflect the ball, your speed is:

mv = MV + m(-v)

V = 2mv / M

To compare these, we need the common denominator.

If you catch the ball:

V = mMv / (M (m + M))

If you throw the ball:

V = 2m(m + M)v / (M (m + M))

Comparing the numerators, we can see M < 2(m + M), so catching the ball results in a lower speed.

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A 35 kg boy is riding a 65 kg go-cart. He pushes on the gas pedal, causing the cart to accelerate at 5 m/s2. Use the equation F
trasher [3.6K]

Answer:

\boxed {\boxed {\sf 500 \ Newtons }}

Explanation:

The equation for force is given:

F=m*a

First, we must find the total mass, which is the sum of the boy's mass and the go-cart's mass.

  • total mass= boy's mass + go cart's mass

The boy's mass is 35 kilograms and the go cart's is 65 kilograms.

  • total mass= 35 kg+ 65 kg=100 kg

Now we know the total mass and the acceleration.

m= 100 \ kg \\a= 5 \ m/s^2

Substitute the values into the formula.

F=100 \ kg * 5 \ m/s^2

Multiply.

F= 500 \ kg*m/s^2

  • 1 kilograms meter per square second is equal to 1 Newton.
  • Our answer of 500 kg*m/s² is equal to 500 Newtons.

F= 500 \ N

The force exerted by the go cart engine is <u>500 Newtons.</u>

4 0
2 years ago
Read 2 more answers
When the sphere makes a complete revolution around its circular path, does it spend:_______
topjm [15]

Answer:

Explanation:

the same amount of time in both halves of the circle

5 0
2 years ago
A 2 kg toy car moves at a speed of 5 m/s.<br> What is the kinetic energy of the car?
ANTONII [103]

Answer:

<h2>The answer is 25 J</h2>

Explanation:

The kinetic energy of an object can be found by using the formula

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

m is the mass

v is the velocity

From the question we have

KE =  \frac{1}{2}  \times 2 \times  {5}^{2}  \\  = 1 \times  {5}^{2}

We have the final answer as

<h3>25 J</h3>

Hope this helps you

5 0
2 years ago
A bullet leaves a gun with a horizontal velocity of 100 m/s. Calculate the distance it would travel in 1.3 seconds.
salantis [7]

Answer:

130m

Explanation:

You just have to multiply velocity by the time traveled:

100m/s * 1.3s = 130m!

5 0
3 years ago
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A good train took 7 hours to complete its journey. For the first 3 hours, it travelled an average speed of 186km/h. What was the
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I really hope this helps

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2 years ago
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