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4 years ago

Which change will cause the gravitational force between a baseball and a soccer ball to increase? Check all that apply.

Physics

2 answers:

deff fn [24]4 years ago

7 0

Answer

moving the balls closer together

pumping more air into the soccer ball

putting the baseball in a plastic case

Explanation

Gravitational force is the force of attraction between two bodies of given masses. It is calculated by the formula;

Gravitational force = Gm₁m₂/r²

This formula shows that the force is directly proportional to G and the masses of the 2 bodies and inversely proportional to square of the distance between them.

∴ The following statements will cause a change in gravitational force;

moving the balls closer together ⇒ Increases the gravitational force

pumping more air into the soccer ball ⇒ Increases the mass of the ball hence increasing the gravitational force.

putting the baseball in a plastic case ⇒ It increases the mass of the ball hence increasing the gravitational force.

insens350 [35]4 years ago

4 0

moving the balls closer together (1
pumping more air into the soccer ball (3)
putting the baseball in a plastic case (6)

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coldgirl [10]

Answer:

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Explanation:

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3 years ago

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n200080 [17]

Answer:

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Explanation:

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3 years ago

PUBLIC SCHOOLS

padilas [110]

Answer:

D. The cart is moving at a constant speed or velocity

Explanation:

Equilibrium is a state of body in which it is either at rest or moves with uniform velocity. The sum of forces acting on such a body is always zero and the sum of all the torques acting on it is also zero.

There are two types of equilibrium as follows:

Static Equilibrium: When a body is at rest it is said to be in static equilibrium.

Dynamic Equilibrium: When a body is moving with constant velocity, then it is said to be in dynamic equilibrium.

Hence, the correct option here will be:

D. The cart is moving at a constant speed or velocity

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3 years ago

g A 1.45-kg block is pushed against a vertical wall by means of a spring (k = 860 N/m). The coefficient of static friction betwe

olga_2 [115]

Answer:

The minimum compression is $x= 0.046m$

Explanation:

From the question we are told that

The mass of the block is $m_b = 1.45 kg$

The spring constant is $k = 860 N/m$

The coefficient of static friction is $\mu = 0.36$

For the the block not slip it mean the sum of forces acting on the horizontal axis is equal to the forces acting on the vertical axis

Now the force acting on the vertical axis is the force due to gravity which is mathematically given as

$F_y = m_b*g$

And the force acting on the horizontal axis is force due to the spring which is mathematically represented as

$F_x = k *x * \mu$

where x is the minimum compression to keep the block from slipping

Now equating this two formulas and making x the subject

$x = \frac{m_b * g}{k * \mu}$

substituting values we have

$x = \frac{1.45 * 9.8}{860 *0.36}$

$x= 0.046m$

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4 years ago

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