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3 years ago

7

Your friend is bragging about his motorcycle. He claims that it can go from a stopped position to 50 miles per hour in three sec

onds .he is describing the motorcycle's_________?

1 answer:

andrew-mc [135]3 years ago

5 0

Acceleration because it is at a rise in speed. The formula for acceleration is Speed/Time.

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Two objects with the same mass move with the same speed but in opposite directions. Compare their kinetic energies.

ddd [48]

Answer:

A. Kinetic energies are equal.

Explanation:

The kinetic energy of the bodies will be equal since the mass and speed are the same.

Kinetic energy is the energy due to the motion of a body.

Mathematically;

K.E = $\frac{1}{2}$ m v²

m is the mass

v is the speed

The kinetic energy is a scalar quantity with no regard for direction.

5 0

3 years ago

Read 2 more answers

A skateboarder shoots off a ramp with a velocity of 7.1 m/s, directed at an angle of 61° above the horizontal. The end of the ra

dsp73

Answer:

Highest point reached = 3.37 m

Explanation:

Initial velocity, = 7.1 m/s

Initial vertical velocity = 7.1 sin 61 = 6.21 m/s

Consider the vertical motion of skateboarder,

We have equation of motion, v² = u² + 2as

Initial velocity, u = 6.21 m/s

Acceleration, a = -9.81 m/s²

Final velocity, v = 0 m/s

Substituting

v² = u² + 2as

0² = 6.21² + 2 x -9.81 x s

s = 1.97 m

So from ramp the position it goes up by 1.97 m

Highest point reached = 1.97 + 1.4 = 3.37 m

6 0

3 years ago

the cross section area of a hole is 725cm^2. Given that the area of a circle is A=3.14r^2 , find the radius of the hole.

asambeis [7]

$The\ area\ of\ a\ circle\ = \pi r^2 \\ 725\ cm^2 = 3.14r^2 \\
230.57 cm^2 = r^2 \\ \sqrt{230.57\ cm^2} = r \\ \boxed{r = 15.18\ cm}$

7 0

3 years ago

How to convert grams to liters?? V.V? so if your using the weigh machine...and the machine reads in grams and you want liters...

masya89 [10]

You are trying to convert mass to volume. That ain't working

6 0

3 years ago

If the force of gravity changes, what happens to the weight of an object?

Nataly [62]

The "weight" is the name we give to the force of gravity on the object. They're the same thing.

7 0

3 years ago