If the displacement of an object is given in SI units by Dx = -5t ...

[shofmannx20]

If the displacement of an object is given in SI units by Dx = -5t + t 2, at t = 2 s its velocity and acceleration are, respectively: (Hint: Use dimensional analysis along with the equations for motion with constant acceleration.)
 a. positive, positive.
  c. negative, negative.
  b. positive, negative.
  d. negative, positive.

Question 2

A Cessna aircraft has a liftoff speed of 120 km/hr. What minimum constant acceleration does this require if the aircraft is to be airborne after a takeoff run of 200 m?
 a. 2.31 m/s2
  c. 4.63 m/s2
  b. 2.78 m/s2
  d. 5.55 m/s2

[okolip]

Answer to Question 1

D

Answer to Question 2

B

[shofmannx20]

Gracias!

[TheDev123]

Excellent