What is the age of a sample if there are 6 grams of an element that have not decayed outof an original 24 grams and has a half-l
1 answer:
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Answer:
(a). The initial speed of the arrow is 49.96 m/s.
(b). The angle is 39.90°.
Explanation:
Given that,
Horizontal distance = 230 m
Time t = 6 sec
Vertical distance = 16 m
We need to calculate the horizontal component
Using formula of horizontal component
Put the value into the formula
.....(I)
We need to calculate the height
Using vertical component
Put the value in the equation
.....(II)
Dividing equation (II) and (I)
(a). We need to calculate the initial speed
Using equation (I)
Put the value into the formula
(b). We have already calculate the angle.
Hence, (a). The initial speed of the arrow is 49.96 m/s.
(b). The angle is 39.90°.
Answer:
x = 17.88[m]
Explanation:
We can find the components of the initial velocity:
We have to remember that the acceleration of gravity will be worked with negative sign, since it acts in the opposite direction to the movement in direction and the projectile upwards.
g = - 9.81[m/s^2]
Now we must find the time it takes for the projectile to hit the ground, as the problem mentions that it does not impact on the board.
With this time we can calculate the horizontal distance: