Question

In: Physics

To find the height of an overhead power line, you throw a ball straight upward. The...

To find the height of an overhead power line, you throw a ball straight upward. The ball passes the line on the way up after 0.85 s , and passes it again on the way down 1.5 s after it was tossed.

a) What is the height of the power line?

b) What is the initial speed of the ball?

Expert Solution

Given that the ball passes the power line at 0.85s and 1.5s after it was tossed.

That means the ball reached its max height in the middle of that time period.

Time Period = 1.5s - 0.85s = 0.65s

Middle of the time period = 0.65s/2 =0.325s

------------

The ball reached its max height at ( 0.85s + 0.325s) 1.175s after it was tossed

-----------

Consider the ball going up

Use formula

At max height velocity becomes zero.

The ball is going up and g is acting downwards ,so put negative sign.

b)ANSWER :

==========================

(a) Given that the ball passes the power line at 0.85s while going up

Use formula

The ball is going up and g is acting downwards ,so put negative sign.

(a) ANSWER :

============================

genius_generous answered 9 months ago

Throw a ball so that it is projected vertically upward. Catch it at the same height...

Throw a ball so that it is projected vertically upward. Catch it at the same height it was released. Have a partner measure the time the ball is in the air - that is, from the time of release to the time the ball lands in your hand. Throw a ball so that it is projected vertically upward. Catch it at the same height it was released. Have a partner measure the time the ball is in the air -...

you throw a ball upward with a seed of 14 m/s. what is the acceleration of...

you throw a ball upward with a seed of 14 m/s. what is the acceleration of the ball after it leaves your hand. ignore air restistance and provide an explanation for your answer.

(a) You throw a beach ball upward with an initial velocity of v0. When the air...

(a) You throw a beach ball upward with an initial velocity of v0. When the air resistance is linear Fdrag = -bv, find the maximum height of the ball, the time of flight, and the final velocity. (b) You throw a beach ball upward with an initial velocity of v0. When the air resistance is quadratic Fdrag = -cv^2, find the maximum height of the ball, the time of flight, and the final velocity. (c) You throw a beach ball...

You throw a ball straight up with an initial velocity of 17.0 m/s. It passes a...

You throw a ball straight up with an initial velocity of 17.0 m/s. It passes a tree branch on the way up at a height of 9.50 m. How much additional time will pass before the ball passes the tree branch on the way back down? Give your answer in seconds.

A cannon directed straight upward launches a ball with an initial speed v. The ball reaches...

A cannon directed straight upward launches a ball with an initial speed v. The ball reaches a maximum height h in a time t. Then, the same cannon is used to launch a second ball straight upward at a speed 2v. In terms of h and t, what is the maximum height the second ball reaches and how long does it take to reach that height? Ignore any effects of air resistance.

If I throw a ball straight up, it deflects slightly to the west due to Coriolis...

If I throw a ball straight up, it deflects slightly to the west due to Coriolis forces. If instead I watch a bubble float up in water, is the bubble deflected west, east, or neither? I think the bubble also moves west, but am not sure. My reasoning is that the air in the bubble must feel a Coriolis force to the west because it is rising. Further, as the bubble rises, the water around it moves, and the net...

A ball is thrown vertically upward a returns to the same height in 5.37 s. A...

A ball is thrown vertically upward a returns to the same height in 5.37 s. A second ball is thrown at 37 degrees . What speed must the second ball have to reach the same height as the first ball?

a ball was thrown straight upward from the top of a building 120 ft high at...

a ball was thrown straight upward from the top of a building 120 ft high at a rate of 24 ft/s. answer the following questions (acceleration is -32 ft/s^2 ) a. at what time t does the ball reach its maximum height? b. what is the velocity of the ball at 3 seconds? c. how long does it take for the ball to hit the ground? d. what is the velocity of the ball when it hits the ground?

A ball is thrown straight upward. The functional form if its position is Y = -4.9...

A ball is thrown straight upward. The functional form if its position is Y = -4.9 t2 + 5t + 3 Find the following. For each part, show your complete solution. Formula. Substitution, and result with the unit. What is the equation of velocity as a function of time by using derivatives? What is the acceleration of motion by using derivatives? What is velocity at maximum height? What is the initial velocity of the ball? To what maximum height the...

5. You throw a ball into the air. It takes 6.0 ? for the ball to...

5. You throw a ball into the air. It takes 6.0 ? for the ball to reach your hand. a. Determine the initial speed at which the ball was thrown. b. Determine the final velocity of the ball when it hits your hand.