10 Questions
What is the condition for an object to topple?
The line of action of its weight must pass beyond the pivot
In projectile motion, what does 'X = R cos θ' represent?
The horizontal component of motion
What is the relation between velocity and time in displacement-time graphs?
Gradient = velocity
Which force increases with speed and converts kinetic energy to heat and sound energy?
Resistance force
According to Newton's laws of motion, what happens to an object's acceleration?
It is directly proportional to the resultant force
What is the correct formula for finding the horizontal component of a vector?
X = R cos θ
In a free-body diagram, which forces should be included?
All forces acting on the object
What is the principle of moments for a body to be in equilibrium?
Sum of clockwise moments equals sum of anticlockwise moments
What is a couple in the context of forces?
Two parallel forces acting in opposite directions
Why does a body in stable equilibrium return to its original position after being displaced?
Due to the center of mass being directly below the point of support
Learn about resolving vectors into horizontal and vertical components, finding the resultant vector, free-body diagrams, and coplanar forces in equilibrium. Understand how to calculate forces on an inclined plane.
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