Question

1. Find the instantaneous velocity of the particle described in the figure below at the following times.

(a)    t = 1.4 s

________m/s

(b)    t = 2.8 s

________m/s

(c)    t = 4.8 s

________m/s

(d)    t = 7.9 s

________m/s

2. We investigated a jet landing on an aircraft carrier. In a later maneuver, the jet comes in for a landing on solid ground with a speed of 85 m/s, and its acceleration can have a maximum magnitude of 8.72 m/s² as it comes to rest.

(a) From the instant the jet touches the runway, what is the minimum time interval needed before it can come to rest?
_____________

(b) Can this jet land on a small tropical island airport where the runway is 0.800 km long?

Yes

No   

(c) Explain your answer.

_________________

3. A ball is thrown directly downward with an initial speed of 8.35 m/s from a height of 29.4 m. After what time interval does it strike the ground?
_______________s

Answer 1

3.t=1.74s

2. A)9.75s

B.)Yes

C)Maximum distance travelled before stopping is less than 800m(.8km) so,it can be landed