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poizon [28]
3 years ago
9

5. Alex goes cruising on his dirt bike. He rides 700 m north, 300 m east, 400 m north, 600 m west, 1200 m south 300 m east and f

inally 100 m north. What distance did he cover? What was his displacement? (use 1cm = 100m)
Physics
1 answer:
Gala2k [10]3 years ago
5 0

Answer:

Explanation:

i hope your mind is clear your full answer in image

please see in image

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20. Wile E. pushes a 76-kg boulder off of the 90-m cliff in an attempt to hit the Roadrunner. What will the kinetic energy of th
KIM [24]

Answer:

67,032 J

Explanation:

According to the law of conservation of energy, the kinetic energy of the boulder just before hitting the Roadrunner (at ground level) will be equal to the gravitational potential energy of the boulder at the top of the cliff, therefore:

K=U=mgh

where

m is the mass of the boulder

g is the acceleration of gravity

h is the height of the cliff

Here we have

m = 76 kg

g = 9.8 m/s^2

h = 90 m

Substituting,

U=(76)(9.8)(90)=67,032 J

6 0
2 years ago
What type of device contains an electromagnet that rotates between the
mamaluj [8]

Answer:

an electric motor

Explanation:

electric motor contains an electromagnet that can rotate between poles of a magnet.

3 0
3 years ago
Which states of matter have particles that move independently of one another with very little attraction?
taurus [48]

Answer:

Gases

Explanation:

Gas has particles that are all very far apart and are moving quickly causing them to have very little to no attraction.

6 0
3 years ago
Read 2 more answers
What is the formula for density? Is it mass x volume or mass/volume?
Zanzabum
Density = Mass/Volume
5 0
3 years ago
Suppose an object’s initial velocity is 10 m/s and its final velocity is 4 m/s. Mass is constant. What can best be concluded abo
grandymaker [24]
Correct answer is:
"Work is negative, the object did work on the environment, and the energy of the system decreases. "

In fact, the work-energy theorem states that the work done is equal to the variation of kinetic energy:
W=\Delta K=K_f - K_i
where W is the work, Kf the final kinetic energy and Ki the initial kinetic energy. Since the kinetic energy depends on the velocity v by:
K= \frac{1}{2} mv^2
and since the final velocity is less than the initial velocity, \Delta K is negative (the kinetic energy of the system is decreased), and the work is negative.This also means that the object did work on the environment: in fact, by doing work, the object gave part of its kinetic energy to the environment, and so its kinetic energy decreased.
8 0
3 years ago
Read 2 more answers
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