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3 years ago

How are mass and weight different? how does gravity affect mass and weight

1 answer:

8 0

Mass is the amount of matter in an object whereas weight is the force of gravity acting on the mass of an object. Different planets exert a different force of gravity on an object-meaning that an object's weight will change depending on the force of gravity acting on it, but it's mad will remain unchanged.

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If the potential (relative to infinity) due to a point charge is V at a distance R from this charge, the distance at which the p

AfilCa [17]

Answer:

R/2

Explanation:

The potential at a distance r is given by :

$V=\dfrac{kq}{r}$

Where

k is electrostatic constant

q is the charge

The potential (relative to infinity) due to a point charge is V at a distance R from this charge. So,

$\dfrac{V_1}{V_2}=\dfrac{r_2}{r_1}$

Put all the values,

$\dfrac{V}{2V}=\dfrac{r_2}{R}\\\\\dfrac{1}{2}=\dfrac{r_2}{R}\\\\r_2=\dfrac{R}{2}$

<h3>So, the distance at which the potential (relative to infinity) is 2V is R/2.</h3>

6 0

3 years ago

There are two cars moving at a constant speed. Car A is moving constantly at 5 m/s on a straight path. Car B is moving constantl

nataly862011 [7]

Answer:

The car moving with constant speed on the path with a deep curve experiences an acceleration towards the center of the curve.

Explanation:

Acceleration is the rate of change of velocity with time. A velocity has both magnitude and direction, and a change in either or both of the magnitude and the direction can produce an acceleration on the car. The car on the curved path experiences a change in the direction of travel along the path. This changes in direction at every point on the curve puts an acceleration on the car towards the center of the curve.

7 0

4 years ago

A wall clock has a minute hand with a length of 0.53 m and an hour hand with a length of 0.26 m. Take the center of the clock as

ollegr [7]

Answer:

a =1.61 × 10⁻⁶ m/s²

Explanation:

given,

length of minute hand = 0.53 m

length of hour hand = 0.26 m

the time taken by the minute hand to complete one revolution is T=3600 s

the angular frequency is

$\omega =\dfrac{2\pi }{T}$

$\omega =\dfrac{2\pi }{3600}$

$\omega=0.001745 rad/sec$

the acceleration is

$a = r \omega^2$

$a = (0.53) \times (0.001745)^2$

a =1.61 × 10⁻⁶ m/s²

3 0

4 years ago

A skier has an acceleration of 2.5 m/s2. How long does it take her to come to a complete stop from a speed of 18 m/s? A. 3.4 s B

noname [10]

The question is defective. If her acceleration is 2.5 m/s/s, then her speed is 2.5 m FASTER each second, and she will never stop.

6 0

3 years ago

A 15kg block of frozen water is being acted upon

Maurinko [17]

Answer:

Explanation:

I'm not 200% sure whether net acceleration would be F1 - F2 or F1 + F2, but C works in both scenarios. Either the net acceleration is 18 N, which is the lowest, or it is 8 N, which is also the lowest.

4 0

3 years ago