3 years ago

A car moving at a speed of 20m/s has a kinetic energy of 300,000 J. What is the car’s mass?

Physics

1 answer:

Dimas [21]3 years ago

6 0

Answer:

JEDJHDFJFEHFNCNCNNCNCNCNCNEECIEJC

Explanation:

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If the wavelength is 10 m and the frequency is 5 Hz, what is the wave speed?

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V = f x wavelength
V = 5 x 10
V = 50m/s

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3 years ago

An amusement park designer wants his swing to have a centripetal acceleration of 24 m/s2. If the velocity of the swing is 11 m/s

viva [34]

Answer:

radius is C: 5.0 m

Explanation:

formular for centripetal acceleration:

$a = \frac{ {V}^{2} }{r}$

a is acceleration

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Yes there is a difference.

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1. A student is biking to school. She travels 0.7 km north, then realizes something has fallen out of her bag.

Snezhnost [94]

Explanation:

(a) Displacement of an object is the shortest path covered by it.

In this problem, a student is biking to school. She travels 0.7 km north, then realizes something has fallen out of her bag. She travels 0.3 km south to retrieve her item. She then travels 0.4 mi north to arrive at school.

0.4 miles = 0.64 km

displacement = 0.7-0.3+0.64 = 1.04 km

(b) Average velocity = total displacement/total time

t = 15 min = 0.25 hour

$v=\dfrac{1.04\ km}{0.25\ h}\\\\v=4.16\ km/h$

Hence, this is the required solution.

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4 years ago

The total potential and kinetic energy of the particles in an object is called

bekas [8.4K]

It can also be called the thermal kinetic energy. The internal energy of a system is the total thermal kinetic energy and thermal potential energy of all its atoms and molecules. The Kinetic Theory of Matter is explains the kinetic energy of particles in an object.

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