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3 years ago

What type of energy does friction produce?

1 answer:

5 0

When friction acts between two surfaces that are in motion, it can create a kinetic energy that is also known as heat energy.

Hope this helps!

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Does a heavier object or a lighter object experience a greater gravitational force?

aalyn [17]

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5 0

3 years ago

If wavelength and speed of a wave are 4 m and 332 m/s respectively, calculate its frequency

Furkat [3]

Explanation:

Given 

wavelength = 4 m

speed = 332 m/s

frequency = ?

We know we have the formula 

wavelength = speed / frequency 

4 = 332 / frequency 

frequency = 332/4

Therefore frequency is 83 Hertz .

4 0

3 years ago

Which statement best describes perigee?

algol13

A. The closet point in the Moon's orbit to Earth . . . . . perigee

B. The farthest point in the Moon's orbit to Earth . . . . . apogee

C. The Sun's orbit that is closest to the Moon . . . . . a meaningless description

D. The closest point in Earth's orbit of the Sun . . . . . perihelion

-- The farthest point in Earth's orbit of the Sun . . . . . aphelion

7 0

4 years ago

An 1800 kg helicopter rises with an upward acceleration of 2.0 m/s?. What lifting force is supplied by its rotating blades?

Viktor [21]

Answer:

Lifting force, F = 21240 N

Explanation:

It is given that,

Mass of the helicopter, m = 1800 kg

It rises with an upward acceleration of 2 m/s². We need to find the lifting force supplied by its rotating blades. It is given by :

F = mg + ma

Where

mg is its weight

and "ma" is an additional acceleration when it is moving upwards.

So, $F=1800\ kg(9.8\ m/s^2+2\ m/s^2)$

F = 21240 N

So, the lifting force supplied by its rotating blades is 21240 N. Hence, this is the required solution.

4 0

4 years ago

If a ball is given an initial speed of 15 m/s on a horizontal, frictionless surface, how fast will the ball be rolling in 5 seco

iris [78.8K]

The surface is frictionless, so there is no frictional force acting on the ball. There are no other forces acting on the ball in the horizontal direction, so it's a uniform motion with constant speed. Therefore, the velocity of the ball will remain the same for the entire duration of the motion, and so after 5 seconds the velocity is still 15 m/s.

7 0

4 years ago