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romanna [79]
3 years ago
12

A ball is kicked and flies from point P to Q following a parabolic path in which the highest point reached is T. The acceleratio

n of the ball is?
Physics
2 answers:
Semenov [28]3 years ago
7 0
After the foot leaves the ball, the acceleration is always downward and is equal to g at all points
nikdorinn [45]3 years ago
3 0
There's not enough information to calculate the acceleration of the ball WHILE it's in contact with the kicker's foot. But once it leaves the toe of the kicker, and until it hits the ground, its acceleration is 9.8 m/s^2 downward, because of gravity.
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3) How far will 20 N of force stretch a spring with a spring constant of 140 N/m?
muminat

Answer:

7 meters, 2.8 meters

Explanation:

work done (nm) = force (n) * distance (m)

140= 20 * m

140/20 = m

m=7 meters

140= 50 * m

140/50 = m

m= 2.8 meters

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2 years ago
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in case you dont want to read the answer is B

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3 years ago
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The captain of a boat wants to travel directly across a river that flows due exst with a speed of 100 m/sHe starts from the sout
Salsk061 [2.6K]

Answer:

86.51° North of West or 273.49°

Explanation:

Let V' = velocity of boat relative to the earth, v = velocity of boat relative to water and V = velocity of water.

Now, by vector addition V' = V + v'.

Since v' = 6.10 m/s in the north direction, v' = (6.10 m/s)j and V = 100 m/s in the east direction, V = (100 m/s)i. So that

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So, we find the direction,Ф the boat must steer to from the components of V'.

So tanФ = 6.10 m/s ÷ 100 m/s

tanФ = 0.061

Ф = tan⁻¹(0.061) = 3.49°

So, the angle from the north is thus 90° - 3.49° = 86.51° North of West or 270° + 3.49° = 273.49°

7 0
2 years ago
What is the average speed in 4 seconds going 8 meters
gulaghasi [49]

Answer:

Explanation:

speed is define as rate of change of distance or displacement

v=s/t

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t=4s

v=8/4

v=2 m/s

6 0
3 years ago
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it make your immune system build up from the strain your puting on you body

Explanation:

excercise is good for you  and builds muscle and blood cells

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