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3 years ago

A boy is standing motionless on a skateboard. He throws a basketball forward. Describe his motion.

Physics

1 answer:

weqwewe [10]3 years ago

8 0

Answer:

Random motion

Explanation:

If the boy throws the basketball forward while at a position on the skateboard, the motion of the ball will be a random motion since we are not told if the ball is moving on a straight line when thrown forward.

In this case, the boy will tend to move in the direction of the ball. Since the ball is moving in a random manner, the motion of the boy will also be a random motion.

A random motion is a motion of a body in a zig zag manner. It is also known as Brownian motion e.g motion of a buzzing mosquito, motion of a smoke coming out of a chimney etc.

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what evidence would you expect to find on the moon if it had been subjected to plate tectonics? (select all that apply.)

irina1246 [14]

Volcanoes and mountains are the evidences that show plate tectonics.

<h3 /><h3>What evidence would you expect to find on the Moon if the Moon had been subjected to plate tectonics? </h3>

The presence of volcanos and mountains are the evidences that provides information that the moon has plate tectonic. If there is no volcanoes and mountains on the moon then we can say that there is no plate tectonic on the moon.

So we can conclude that volcanoes and mountains are the evidences that show plate tectonics.

Learn more about tectonics here: brainly.com/question/2325633

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5 0

2 years ago

A 1400-kg car is moving at a speed of 25m/s. how much kinetic energy does the car have?

Luba_88 [7]

Answer:

437.5Kjoules

Explanation:

K.E=half multiply by mass multiply by square of velocity

=437.5Kjoules

3 0

3 years ago

Convert 2536 mm/min to m/s. Use dimensional analysis.

Deffense [45]

Answer:

As we know that, 

1 mm/min = 1.66667E-5 m/s
1 m/s = 60000 mm/min

Now, come to the question - 

$\\ \implies \sf \: 2536 \times 1.66667E-5 m/s \\ \\ \\ \implies \sf \blue{0.0422666667 \:m/s } \\$

Result : 2536 mm/min = 0.0422666667 m/s.

6 0

4 years ago

A 45.0 - kg girl is standing on a 150. - kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a

Mrac [35]

Answer:

The velocity relative to the surface of the ice is 6.5 m/s.

Explanation:

Given that,

Mass of girl m= 45.0 kg

Mass of plank M= 150 kg

Velocity = 1.50 m/s

We need to calculate the velocity relative to the surface of the ice

Using conservation of momentum

$mv_{1}+Mv_{2}=(m+M)v$

Here, $v_{2}=0$ because plank at rest

$v_{1}=\dfrac{m+M}{m}\times v$

Put the value into the formula

$v_{1}=\dfrac{45+150}{45}\times1.50$

$v_{1}=6.5\ m/s$

Hence, The velocity relative to the surface of the ice is 6.5 m/s.

6 0

3 years ago

5. From the definition of work, explain why only the vertical height of the stairs is measured. Hint: Think of the data table co

natulia [17]

The motivation behind why the vertical stature of the stairs is the main thing measured is that it uncovers to us how much gravity is up against the individual and their weight, so we require this data to decide how much vitality and power we have to get up the stairs.

8 0

4 years ago