Chapter 8: Turning Effect of Forces Physics Mcqs for High School - Grade 9 - Set 3

1)   A man is pulling a trolley on a horizontal road with a force of 100 N making 45 ° with the road. The horizontal and vertical components will be

a. 52.5 N, 85.09 N
b. 55.6 N, 78.6 N
c. 60.3 N, 54.11 N
d. 70 N, 29.23 N
Answer  Explanation 

ANSWER: 52.5 N, 85.09 N

Explanation:
No explanation is available for this question!


2)   If the force ‘F’ is multiplied by arm ‘L’, we get

a. momentum
b. distance
c. torque/moment
d. inertia
Answer  Explanation 

ANSWER: torque/moment

Explanation:
No explanation is available for this question!


3)   Forces that are parallel to each other with the same direction are

a. parallel forces
b. like parallel forces
c. unlike parallel forces
d. none of above
Answer  Explanation 

ANSWER: like parallel forces

Explanation:
No explanation is available for this question!


4)   The steering of a car has a radius of 15 cm. The torque produced by a couple of 40 N will be

a. 12 Nm
b. 10.8 Nm
c. 15 Nm
d. 12.59 Nm
Answer  Explanation 

ANSWER: 12 Nm

Explanation:
No explanation is available for this question!


5)   If the distance between all pairs of particles of the body do not change by applying a force then the body is said to be

a. flexible
b. small
c. large
d. rigid
Answer  Explanation 

ANSWER: rigid

Explanation:
No explanation is available for this question!


6)   If the resultant of all the forces acting on the body is zero, then the body satisfies

a. 2nd condition for equilibrium
b. third condition for equilibrium
c. no equilibrium state
d. first condition for equilibrium
Answer  Explanation 

ANSWER: first condition for equilibrium

Explanation:
No explanation is available for this question!


7)   The body is said to be rigid if the distance between pairs if particles doesn't change by applying

a. friction
b. law of inertia
c. force
d. law of momentum
Answer  Explanation 

ANSWER: force

Explanation:
No explanation is available for this question!


8)   Vehicles are made heavy at the base in order to

a. decrease center of gravity
b. increase center of gravity
c. decrease weight
d. increase weight
Answer  Explanation 

ANSWER: decrease center of gravity

Explanation:
No explanation is available for this question!


9)   Point where whole weight of body acts vertically is called

a. center of mass
b. mid point
c. center of gravity
d. center of volume
Answer  Explanation 

ANSWER: center of gravity

Explanation:
No explanation is available for this question!


10)   The forces that are parallel to each other and have the opposite direction are called

a. negative forces
b. unlike parallel forces
c. like parallel forces
d. positive forces
Answer  Explanation 

ANSWER: unlike parallel forces

Explanation:
No explanation is available for this question!