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Sliva [168]
3 years ago
12

Compare the friction force on the cart when it is rolling along the blacktop parking lot to the friction force on

Physics
2 answers:
Maksim231197 [3]3 years ago
5 0
It is a lot rougher in the parking lot and smoother inside the grocery store
Zolol [24]3 years ago
3 0

Answer:

Rough surface offer more resistance as compare to smooth surface.

Explanation:

Friction is defined as the force which offer resistance to a moving object i.e. hold back the movement of sliding object. It always act in opposite direction.

When the two object come into contact of one another then they rub against each other thereby, generating frictional force. For example, when a cart roll along the blacktop parking lot then the rough surface of parking lot offer resistance to cart which slow down the speed of cart, whereas, when the same cart roll along the smooth floor inside the grocery store then it will move more freely due to the less resistance offered by the smooth vinyl tile inside the store.

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The kinetic energy K of a moving object varies jointly with its mass m and the square of its velocity v. If an object weighing 4
nata0808 [166]

Answer:

K' = 1777.777  J

Explanation:

Given that

m = 40 kg

v= 15 m/s

K=1000

Given that kinetic energy(K) varies with mass(m) and velocity(v)

 K= C(mv²)

Where

C= Constant

m=mass

v=velocity

When

m = 40 kg ,v= 15 m/s ,K=1000

 K= C(mv²)

1000 = C( 40 x 15²)

C=0.111111

When m = 40 kg and v= 20 m/s

K' = C(mv²)

K= 0.1111 x (40 x 20²)

K' = 1777.777  J

5 0
4 years ago
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A wave with a frequency of 17 Hz has a wavelength of 4 meters. At what speed (in m/s) will this wave travel?
Molodets [167]

Answer:68m/s

Explanation:

Frequency=17Hz

Wavelength=4metre

Wave speed=frequency x wavelength

Wave speed =17 x 4

Wave speed =68m/s

5 0
3 years ago
Why is the statement "we evoleved from monkeys" true?
gizmo_the_mogwai [7]
Looking back at the evolution of humans, we are most closely related to chimpanzees, credited to opposable thumbs
6 0
3 years ago
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According to the quantum theory of radiation,
masya89 [10]

Answer:

Option B

Explanation:

According to quantum theory of radiation electromagnetic field or electromagnetic  radiation( like light) produce by accelerated charge object and the quantum of EM radiations is photon which has discrete energy. So, EM field can have only certain values of total energy and no other value due the discrete nature of the energy of photon. Hence option B is correct

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4 years ago
What kind of change in light (shift) would you
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