ball is thrown vertically apart from the top of a building 288 feet tall with an initial velocity of 48 feet per second. The distance s (in feet) of the off from the ground after t seconds is s(t)=288+48t-16t^2 a) after how many seconds does the ball strike the ground? b) after how many seconds will the ball pass the top of the building on it way down?

A particle moves along the x-axis so that its coordinate follows the law x(t) =2t^2 +4, where x is in meters, and t is in seconds. Find the particles velocity (in m/s) O 23 O 7t O. 17.3 4t O none of the above

A firework is projected from the level ground in such a way that v0y = 10m/s and v0x = 20 m/s.a) Find the time it takes the firework to reach its maximum height reached.b) Since the firework returns to the ground, it has the same initial and final height. Whenthis happens, the time it takes the object to land is twice the time it takes to reach its maximum height. Using this information, find the horizontal and vertical components of the velocity of the firework right as it lands.

Number An ion's position vector is initially 7 = (2.4 m )î + (−7.4 m )3 + (6.5 m ). In unit-vector notation, what is its average velocity during the 6.7 s? )ĵ i 1 + = 9.1 m )i + (−9.9 m )ĵ + (−10 m )k, ) + (-10 m ), and 6.7 s later it is -0.37313433 Ĵ + MI -2.46268657 k Units m/s

Problem 1: An object is thrown off the top of a 6.2-m tall building with a velocity of 2.9 m/s at an angle of 37° with respect to the horizontal. Part (a) How long is the object in the air in seconds? S sin() cos() tan() 7 8 9. НОME cotan() asin() acos() 4 6 atan() acotan() sinh() 1 3 cosh() tanh() cotanh() END O Degrees O Radians CLEAR Part (b) What is the horizontal distance the object covers in meters?

On level ground, a football is thrown up at a certain angle. The ball is in the air 2.0 s and strikes the ground 30.0 m from the thrower. What was the ball's total initial velocity?

A rock is tossed from the top of a building at an angle of 20° above the horizontal with an initial speed of 15 m/s. The rock lands on the ground 3.0 s after it is tossed. What is the height of the building (in m)? m

Do the first question