(9. THE FOLLOWING QUESTIONS ARE BASED ON THE INFORMATION GIVEN BELOW. The lift of an observatory tower is accelerating upwards with a = 1Im/s, together with a kid inside it. The moment the lift reaches a speed r = 4m/s, the kid lets go of a ball that she has been holding in her hand, at a height L- 2.9 m above the lift floor. As you answer the questions, ignore air resistance and treat the ball as a point-mass. (Take g= 9.8 m/s) A) How long, in seconds does it take the ball t hit the lift floor? Answer: B) What is the total distance travelled by the ball, in meters, from the moment it is released until it hits the floor? Answer

A man on a motorcycle plans to make a jump as shown in the figure. If he leaves the ramp with a speed of 30.0 m/s and has a speed of 28.4 m/s at the top of his trajectory, determine his maximum height (h) (in m) above the end of the ramp. Ignore friction and air resistance. ורו

The force on a 2 kg object varies with position as shown in fig. below. If the object was initially at rest, find its speed in m/s at x = 2.5 m. (write the answer with three significant figures only). X(m) Answer: (N) (x)d

A small block slides down a frictionless track whose shape is described by y = (x^2) /d for x<0 and by y = -(x^2)/d for x>0. The value of d is 4.16 m, and x and y are measured in meters as usual. Suppose the block starts from rest on the track, at x = -2.7 m. What will the block s speed be when it reaches x = 0?     8.79 m/s     5.86 m/s     4.14 m/s     2.90 m/s

You drop a 1.40 kg book to a friend who stands on the ground at distance D = 12.0 m below. Your friend's outstretched hands are at distance d = 1.30 m above the ground (see the figure). (a) What is the speed of the book when it reaches her hands? (b) If we substituted a second book with twice the mass, what would its speed be when it reaches her hands? (c) If, instead, the book were thrown down with initial speed 5.90 m/s, what would be the answer to (a)? (a) Number i Units (b) Number i Units

Will give thumbs-up! Solve in 3 decimal places.

A small block slides down a frictionless track whose shape is described by y = (x^2) /d for x<0 and by y = -(x^2)/d for x>0. The value of d is 4.49 m, and x and y are measured in meters as usual. Suppose the block starts from rest on the track, at x = -2.64 m. What will the blocks speed be when it reaches x = 0?     3.90 m/s     2.34 m/s     7.18 m/s     5.52 m/s