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2 years ago

A basketball is resting on the ground.

Physics

1 answer:

kakasveta [241]2 years ago

8 0

Answer:

Explanation:

there is no net force on the basketball

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Estimate the average force that a baseball pitcher's hand exerts on a 0.145-kg baseball as he throws a 40-m/s pitch. Assume the

Kitty [74]

Answer:

38.67 N

Explanation:

v = Final velocity = 40 m/s

u = Initial velocity

m = Mass of ball = 0.145kg

s = Displacement of ball = 3 m

Equation of motion

$v^2-u^2=2as\\\Rightarrow a=\frac{v^2-u^2}{2s}\\\Rightarrow a=\frac{40^2-0^2}{2\times 3}=\frac{800}{3}\ m/s^2$

F=ma

$\\\Rightarrow F=0.145\times \frac{800}{3}\\\Rightarrow F=38.67\ N$

∴ Average force that a baseball pitcher's hand exerts on the ball is 38.67 N

6 0

3 years ago

Read 2 more answers

White light is shining on a green grape. The grape _____.

Marat540 [252]

The grape absorbs all colors except green, and green light is the
only light that remains to bounce around and enter people's eyes.

This is a big part of the reason why, whenever somebody looks at
the grape, they remark "Oh look ! The grape is green !"

7 0

3 years ago

Read 2 more answers

Please help!!

Ronch [10]

Answer:

Explanation:

The distance will be the total distannce covered during the journey.

If you move 3 meters East and move 4 meters north, then the distance will be calculated as;

Distance = distnace through East+distance through north

Distance = 3m + 4m

<em>Distance = 7m</em>

Displacement is the distance covered in a specified direction. It is the shortest distance covered by me. This can be gotten using the Pythagoras theorem.

d² = 3²+4²

d² = 9+16

d² = 25

d = √25

d = 5m

<em>Hence the displacement of the object is 5metres</em>

5 0

3 years ago

The moon's mass is____

Akimi4 [234]

Answer:

7.35kg

Explanation:

Hope this is helpful :)

7 0

2 years ago

State and apply the relation between electric force and electric field.

Olin [163]

Answer:

The following is the relation between electric force and field

$Electric Field = Electric Force / charge$

Explanation:

Electric force is the magnitude of electrostatic forces between two charges which is directly proportional to product of both charges and inversely proportional to the square of the distance between them.

$F=k*q1*q2/r^2$

Here k is the coulumb's constant.

Where as the electric field is the electric force per unit charge. It is the function of electric force. It is the vector quantity and its direction is taken radially inward or outward depending on the nature of charge.

Its equation is

Electric Field $E=F/q$

Electric Field units are in volts where as Electric force units are newtons.

5 0

3 years ago