# Physics

a bowling ball is thrown down from the top of a building at 20 m/s. Find the distance the ball travels in
A) 1 s
B) 3 s

should I make the 20 m/s negative? I'm assuming the ball is just being thrown stright down...

I'm using the formula d=V(initial)*t+1/2a*t^2

I'm getting -24.9 for a and -104.1 for b if I assume that 20 m/s is negative. I just really need someone to clear this up for me. please and thank you.

1. 👍
2. 👎
3. 👁
1. Please, please, I really need gelp for this.

1. 👍
2. 👎
2. yes, make the intial velocity negative, and a is negative also.

d= vi*t+1/2 g t^2 in the first second.
d=-20*1 -4.9 *1=-24.9 meters, if + is upward.

1. 👍
2. 👎
👤
bobpursley
3. oh, okay, hank you so much!

1. 👍
2. 👎

## Similar Questions

1. ### physics

a ball is thrown horizontally from the top of a building 35m. high. the ball strikes the ground at a point 80m from the base of the building. a. find the time the ball is in flight b. its initial velocity c. the x and y components

2. ### Physics

A bowling ball weighing 71.2 N is attached to the ceiling by a 3.80 m rope. The ball is pulled to one side and released; it then swings back and forth like a pedulum. as the rope swings through its lowest point, the speed of the

3. ### mathematics

the height of a ball t seconds after it is thrown into the air from the top of the building can be modelled by h(t)= -16t2+48t+64 where h(t) is height in metres.how high is the building? how high does the ball rise before starting

4. ### Algebra

A. A bowling ball is dropped from a height of 35 feet write a function that gives the height h (in feet) of the bowling ball after t seconds H(t)=__ B. Find the height of the bowling ball after 1 second C. How long does the

1. ### Physics

A ball is thrown at an angle of 37.1degrees above the horizontal from a point on the top of a building and 60m from the edge of the building. It just misses the edge of the building and continues on towards the ground. The

2. ### physics

A ball is thrown upward from the top of a 27.0-m-tall building. The ball's initial speed is 12 m/s. At the same instant, a person is running on the ground at a distance of 31.2 m from the building. What must be the average speed

3. ### Math

A ball is thrown downward from the top of a 100-foot building with an initial velocity of 14 feet per second. The height of the ball h after t seconds is given by the equation h=-16t^2-14t+100. How long after the ball is thrown

4. ### Physics urgent pls!

A ball is tossed from an upper-storey window of a building.The ball is given an initial velocity of 8 m/s at an angle of 20 degrees below the horizontal.it strikes the ground 3s later .(a) How far horizontally from the base of the

1. ### Physics (mechanics)

There are two parts for this questions... "When a bowling ball collides with the pins, the momentum of the bowling ball and the pins is conserved." Give the assumptions and conditions for this statement. Compare the effect on the

2. ### Math

A ball is thrown straight up from the top of a building 148 ft. tall with an initial velocity of 72 ft per second. The distance s(t) (in feet) of the ball from the ground is given by s(t) = 148 + 72t − 16t2. Find the maximum

3. ### mathematics

A bowling ball is dropped from a height of 40 feet. a. Write a function that gives the height h (in feet) of the bowling ball after t seconds. h(t)= b. Find the height of the bowling ball after 1 second. The height of the ball

4. ### Physics

A 10 kg bowling ball sits at the top of a 10 m hill and then slides down its icy hillside. a. What is the speed of the bowling ball when it reaches the bottom of the hill? b. What is the change in kinetic energy of the system as