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Questions and Answers
What is the condition for an object to topple?
What is the condition for an object to topple?
- The line of action of its weight must pass beyond the pivot (correct)
- The object must have a large surface area
- The line of action of its weight must be below the pivot
- The object must be heavy
In projectile motion, what does 'X = R cos θ' represent?
In projectile motion, what does 'X = R cos θ' represent?
- The resistance force
- The vertical component of motion
- The horizontal component of motion (correct)
- The driving force
What is the relation between velocity and time in displacement-time graphs?
What is the relation between velocity and time in displacement-time graphs?
- Area under graph = velocity
- Area under graph = acceleration
- Gradient = acceleration
- Gradient = velocity (correct)
Which force increases with speed and converts kinetic energy to heat and sound energy?
Which force increases with speed and converts kinetic energy to heat and sound energy?
According to Newton's laws of motion, what happens to an object's acceleration?
According to Newton's laws of motion, what happens to an object's acceleration?
What is the correct formula for finding the horizontal component of a vector?
What is the correct formula for finding the horizontal component of a vector?
In a free-body diagram, which forces should be included?
In a free-body diagram, which forces should be included?
What is the principle of moments for a body to be in equilibrium?
What is the principle of moments for a body to be in equilibrium?
What is a couple in the context of forces?
What is a couple in the context of forces?
Why does a body in stable equilibrium return to its original position after being displaced?
Why does a body in stable equilibrium return to its original position after being displaced?
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