Question

Can I get help with these questions please show all work thank you

If you throw a ball straight up at 118 ms bow high will it go? a 11.5 m b) 0.29 m c) 0.42 m d) 7.1 m Given a position function x(t) = -5t^+ 14.2t^3 - 6, what is the acceleration at time t = 1.5 s? a) 69.2 m/s^2 b)-72.3 m/s^2 c) 150 m/s^2 d) -211.5 m/s^2 If a pulls straight up on a 350 kg box using a rope is rated at 4000N, how large of that acceleration can it produce before the rope breaks? 1) 1.62 m/s^2 b) -9.8 m/s^2 c) -3/3 m/s^2 d) 12.7 m/s^2 If you fire a cannon ball at a 55 degree angle and it travels 12m, what was the initial speed of the ball? a) 10.84 m/s b) 3.10 m/s c) 132 m/s d) m/s A car is moving to the right at 60 mph (26.8 m/s). The brakes are applied and produce an acceleration of -6.5 m/s^2. How long does it take to come to a complete stop? a) 0.86 s b) 31.6 s c) 4.12 s d) 9.96 s Given two forces F_A = 213 i-6.2 j[N] and F_B = -2.6 i + 7.1 j[N] What is the magnitude of F_A + F_s? a) 18.7 N b) 1.65 N c) 23.1 N d) 112 N What is direction of F_A - F_B? a) -47.1 degree b) 92.6 degree c) 3.46 degree d) -70.4 degree If you drop a 9 kg book from a 10 m building what is the acceleration? _____ If you drop a 550 kg steel beam off of a 200 m cliff what is the acceleration?______ Find F_N for the system below if m = 12 kg and F_ = 80 N a) 84.3 N b) 15 N c) 157.6 N d) 192. 6 N Is the normal force in problem 14 less than, equal to, or greater than the weight of the box. _____

Answer 1

here,

1)

initial speed of the ball , u = 11.8 m/s

the maximum height , h = u^2 /(2 * g)

h = 11.8^2 /( 2 * 9.8) m

h = 7.1 m

the maximum height is d) 7.1 m