1.If the forces acting on the couple are in the same direction, that is they are not in the opposite direction as always they are, then?
a) The direction of the forces doesn’t determine the moment
b) The couple moment will be maximum

c)The couple moment will be maximum

d)The couple is not possible

e)No change occurs

2.The resultant force acting in the couple is:

A)Zero

b)Infinite

c)Twice the magnitude of the single force

d)Half the magnitude of the single force

e)None of the above

3.The distance between the forces acting in the couple is
a) Infinity
b) Zero
c) A finite distance

d) A circular loop

e) None of the above

4.The driver of a speeding empty truck slams on the brakes and skids to a stop through a distance d. On a second trial, the truck carries a load that doubles its mass. What will now be the truck’s “skidding distance”?

(a) 4d           (b) 2d           (c)            (d) d           (e) d/2

5.A train locomotive has broken through the wall of a train station. During the collision, what can be said about the force exerted by the locomotive on the wall?

(a) The locomotive’s force on the wall was larger than the wall’s force on the locomotive.

(b) The locomotive’s force on the wall was equal to the wall’s force on the locomotive.

(c) The locomotive’s force on the wall was less than the wall’s force on the locomotive.

(d) The wall cannot be said to “exert” a force; after all, it broke.

(e) None of the above

6.Two objects are connected by a string that passes over a frictionless pulley as in Figure here given, where m1, m2 and a1 and a2 are the magnitudes of the respective accelerations. Which mathematical statement is true regarding the magnitude of the acceleration a2 of the mass m2?

(a) a2 > g       (b) a2 < g       (c) a2 = g       (d) a2 < a1              (e) a2 > a1

7.A truck loaded with sand accelerates along a highway. The driving force on the truck remains constant. What happens to the acceleration of the truck if its trailer leaks sand at a constant rate through a hole in its bottom?

(a) It decreases at a steady rate.

(b) It increases at a steady rate.

(c) It increases and then decreases.

(d) It decreases and then increases.

(e) It remains constant.

8.If an object is in equilibrium, which of the following statements is not true?

(a) The speed of the object remains constant.

(b) The acceleration of the object is zero.

(c) The net force acting on the object is zero.

(d) The object must be at rest.

(e) There are at least two forces acting on the object.

9.An object of mass m moves with acceleration a_S down a rough incline. Which of the following forces should appear in a free-body diagram of the object? Choose all correct answers.

(a) the gravitational force exerted by the planet

(b) m a_S in the direction of motion

(c) the normal force exerted by the incline

(d) the friction force exerted by the incline

(e) the force exerted by the object on the incline