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3 years ago

Describe 3 ways you could change your velocity when riding a bicycle.

2 answers:

8 0

Change speed but keep on going the same direction
<span>change direction but keep going the same speed </span>
<span>change both direction and speed </span>

dimaraw [331]3 years ago

7 0

Lean forward, backward stop peddling, stop everything

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What is quantum physics?

lara [203]

Answer:

A fundamental theory that provides a description of the physical properties of nature at the scale of atoms and subatomic particles.

Explanation:

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2 years ago

Once potential energy is lost on a roller coaster it cannot be gained all the way back true or false

nignag [31]

Answer:

true

Explanation:

because the roller coaster can't work without energy

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3 years ago

How much time would it take for the sound of thunder to travel 1500 meters if sound travels at a speed of 330 m/s

Elis [28]

Data given:

Δx=1500m

v=330m/s

t=?

Formula:

V=Δx/t

Solution:

t=1500m/330m/s

t=4.5s

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3 years ago

A(n) 30 kg boy rides a roller coaster. The acceleration of gravity is 9.8 m/s 2 . With what force does he press against the seat

forsale [732]

Answer:

Force, F = 187.42 N

Explanation:

It is given that,

Mass of boy, m = 30 kg

Acceleration due to gravity, $a=9.8\ m/s^2$

Radius of curvature of the roller coaster, r = 15 m

Speed of the car, v = 7.3 m/s

The force acting on the boy are force of gravity and the centripetal force. The net force acting on him is as follows :

$F=mg-\dfrac{mv^2}{r}$

$F=m(g-\dfrac{v^2}{r})$

$F=30\times (9.8-\dfrac{(7.3)^2}{15})$

F = 187.42 N

So, he press against the seat with a force is 187.42 N. Hence, this is the required solution.

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3 years ago

Which of the following is a type of physical change?

goblinko [34]

Answer is C. All of the others are internal/molecular changes.

8 0

3 years ago

Read 2 more answers