The speed of a 4.0-kg object is given by v = (2t) m/s, where t is ...

[jace]

The speed of a 4.0-kg object is given by v = (2t) m/s, where t is in s. At what rate is the resultant force on this object doing work at t = 1 s?
 a. 48 W
  b. 40 W
  c. 32 W
  d. 56 W
  e. 16 W

Question 2

A 2.0-kg block slides down a plane (inclined at 40 with the horizontal) at a constant speed of 5.0 m/s. At what rate is the gravitational force on the block doing work?
 a. +98 W
  b. +63 W
  c. zero
  d. +75 W
  e. -75 W

[manuelcastillo]

Answer to Question 1

E

Answer to Question 2

B

[jace]

Thanks for the timely response, appreciate it

[Liddy]

Excellent