A mass of 3 kg is moving with a velocity of 0.25 m/s. An ...

[tiara099]

A mass of 3 kg is moving with a velocity of 0.25 m/s. An unbalanced force is applied and increases the velocity to 0.45 m/s. The work done by the unbalanced force is
  a) 0.34 J
  b) 0.84 J
  c) 0.21 J
  d) 1.2 J

Question 2

Particles (mass of each = 0.40 kg) are placed at the 60-cm and 100-cm marks of a meter stick of negligible mass. This rigid body is free to rotate about a frictionless pivot at the 0-cm end. The body is released from rest in the horizontal position. What is the magnitude of the initial linear acceleration of the end of the body opposite the pivot?
 a. 15 m/s2
  b. 9.8 m/s2
  c. 5.8 m/s2
  d. 12 m/s2
  e. 4.7 m/s2

[marict]

Answer to Question 1

c

Answer to Question 2

d

[tiara099]

Thank you!

[marict]

Always glad to help...