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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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Two pans of a balance are 46.3 cm apart. The fulcrum of the balance has been shifted 0.633 away from the center by a dishonest s
soldier1979 [14.2K]

distance of each pan from the center or fulcrum is given as

r = 23.15 cm

now if dishonest shopkeeper shifted it by 0.633 cm from center

so distance on each side is given as

d_1 = 23.15 - 0.633 = 22.52 cm

d_2 = 23.15 + 0.633 = 23.78 cm

now the weight is balance as

W_1d_1 = W_2d_2

W(22.52) = W_2(23.78)

now we will have

W_2 = 0.95W

now we can find the percentage change as

percentage = \frac{W - W_2}{W} \times 100

percentage = 5%

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4 years ago
All valid equations in physics have consistent units. Are all equations that have consistent units valid?
sweet [91]

Answer:

c. No. An equation may have consistent units but still be numerically invaid.

Explanation:

For an equation to be corrected, it should have consistent units and also be numerically correct.

Most equation are of the form;

(Actual quantity) = (dimensionless constant) × (dimensionally correct quantity)

From the above, without the dimensionless constant the equation would be numerically wrong.

For example; Kinetic energy equation.

KE = 0.5(mv^2)

Without the dimensionless constant '0.5' the equation would be dimensionally correct but numerically wrong.

8 0
4 years ago
In a displacement versus time graph, what does the slope of a line at any point indicate?
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In a displacement versus time graph, the slope of the line at any point on the graph indicates the <em>magnitude of velocity</em>.  

(It can't indicate velocity completely, because the graph shows nothing about the direction of the motion.)

4 0
3 years ago
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Answer:

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Anon25 [30]
I thinks its period because they are on the last column to the right
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