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4 years ago

15

The gravitational force between two objects is 45,000 N. What will be the gravitational force between the two objects if the dis

tance between the objects is reduced by one-half?

1 answer:

Nostrana [21]4 years ago

7 0

Answer:

180000 N

Explanation:

According to Newton's law of gravitation

F= G m1 m2 / r^2

This expression shows that if distance is reduced to half the gravitational force will increase 4 times.

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4 years ago

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3 years ago

Relative to the ground, a car has a velocity of 15.3 m/s, directed due north. Relative to this car, a truck has a velocity of 22

bogdanovich [222]

Answer:

The magnitude of the truck's velocity relative to the ground is 35.82 m/s.

Explanation:

Given that,

Velocity of car relative to ground = 15.3 m/s

Velocity of truck relative to car = 22.5 m/s

We need to calculate the magnitude of the truck's velocity relative to the ground

We need to calculate the x component of the velocity

$v_{x}=22.5\cos\theta$

$v_{x}=22.5\cos52^{\circ}$

$v_{x}=13.852\ m/s$

We need to calculate the y component of the velocity

$v_{y}=15.3+22.5\sin\theta$

$v_{y}=15.3+22.5\sin52^{\circ}$

$v_{y}=33.030\ m/s$

Using Pythagorean theorem

$|v|=\sqrt{v_{x}^2+v_{y}^2}$

$|v|=\sqrt{(13.852)^2+(33.030)^2}$

$|v|=35.82\ m/s$

Hence, The magnitude of the truck's velocity relative to the ground is 35.82 m/s.

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3 years ago