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ivann1987 [24]
3 years ago
11

Scenario:

Physics
1 answer:
Ivan3 years ago
7 0

Explanation:

K.E. of marble 1 = (1/2) × 0.2 × (22/0.8) ^2

= 0.1 × 756.25

= 75.625

K.E. of marble 2 = (1/2) × 1.2 × (26/0.8)^2

= 0.6 × 1056.25

= 633.75

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If the size of the charge value is tripled for both of twopoint charges maintained at a constant separation, the mutual forcebet
ch4aika [34]

Answer:

a) 9.0

Explanation:

The force between two point charges, obeys Coulomb's Law, which can be written as follows:

F =\frac{k*q1*q2}{(r12)^{2} }

As it  can be seen, if the separation between the charges remains the same, the new value of the force will be directly proportional to the product of the charges.

If both charges are tripled, the mutual force between them will be changed in a factor equal to 3.0*3.0 = 9.0

8 0
3 years ago
A car is moving at a constant speed of 14 m/s when the driver presses down on the gas pedal and accelerates for 14 s with an acc
Vinil7 [7]

acceleration of car is 1.8 m/s^2

time = 14 s

initial speed = 14 m/s

so the final speed is calculated by

v_f = v_i + at

v_f = 14 + 14 * 1.8

v_f = 39.2 m/s

so the total distance moved in this interval of time is

d = \frac{v_f + v_i}{2}* t

d = \frac{39.2 + 14}{2}* 14

d = 372.4 m

now the average speed is given as

v = \frac{d}{t}

v = \frac{372.4}{14}

v = 26.6 m/s

so the average speed will be 26.6 m/s

7 0
3 years ago
A water balloon cannon is fired at 35 m/s at an angle of 50∘ above the horizontal. How far away will it fall?
hoa [83]
Use the equation in the physics reference sheet. You can use the distance formula
6 0
3 years ago
The distance between two objects is increased by 3 times the original distance. How will this change he force of attraction betw
Whitepunk [10]

The force of attraction will decrease when objects move apart

3 0
3 years ago
A student presses a book between his hands, as the drawing indicates. The forces that he exerts on the front and back covers of
Aleksandr-060686 [28]

Answer: 39.5 N

Explanation:

2 x force x static friction coefficient = weight  (weight=2μsF)

force = ?

static friction coefficient = 0.416

weight = 32.9N

substituting the values above into the equation we get

2 x F x 0.416 = 32.9

F = 32.9 / (2 x 0.416)

F = 39.5N

4 0
3 years ago
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