Mechanical Aptitude Forces and Motion Principles Flashcards
7 cards from real MECHANICAL APTITUDE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Mechanical Aptitude Forces and Motion Principles flashcards as text
A wrench applies a force of 30 N at a distance of 0.2 m from a bolt. What is the torque produced?
Answer: 6 N·m
Torque = force × distance = 30 N × 0.2 m = 6 N·m.
Which type of friction acts on an object that is sliding across a surface?
Answer: Kinetic friction
Kinetic (sliding) friction acts between surfaces in relative motion against each other.
An object moving in a circle at constant speed is subject to a net force directed:
Answer: Toward the center
Centripetal force always points toward the center of the circular path.
A 2 kg object moving at 4 m/s has a kinetic energy of:
Answer: 16 J
KE = ½mv² = ½ × 2 × 4² = ½ × 2 × 16 = 16 J.
Which of the following correctly states Newton's third law?
Answer: For every action there is an equal and opposite reaction
Newton's third law states that action-reaction pairs are always equal in magnitude and opposite in direction.
If you push a heavy crate with 100 N and it doesn't move, what does that tell you about static friction?
Answer: Static friction equals exactly 100 N
Since the crate is in equilibrium (not moving), static friction must equal the applied force of 100 N.
A sled slides down a hill and gains speed. Which force is primarily responsible for this acceleration?
Answer: The component of gravity parallel to the slope
The component of gravity acting along the slope (parallel component) pulls the sled downhill, causing it to accelerate.