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 10 kg box is pushed across a frictionless surface with a net force of 20 N. What is its acceleration?
Answer: 2 m/s²
Newton's second law: a = F/m = 20 N ÷ 10 kg = 2 m/s².
Which of the following best describes inertia?
Answer: The tendency of an object to resist changes in its state of motion
Inertia is the property of matter that resists any change in velocity, whether at rest or in motion.
A car traveling at 60 mph applies its brakes and comes to a stop in 6 seconds. What is the deceleration?
Answer: 10 mph/s
Deceleration = change in speed ÷ time = 60 mph ÷ 6 s = 10 mph/s.
When two equal and opposite forces act on a stationary object, the object will:
Answer: Remain stationary
Equal and opposite forces produce a net force of zero, so the object remains in equilibrium.
A ball is thrown horizontally from a cliff. Which statement about its motion is correct?
Answer: Its vertical speed increases due to gravity
Gravity continuously accelerates the ball downward, so vertical speed increases while horizontal speed remains constant.
If you double the mass of an object while keeping the net force the same, the acceleration will:
Answer: Halve
From a = F/m, doubling mass with constant force cuts acceleration in half.
A 5 kg object is in free fall (ignoring air resistance). What is the net force acting on it? (g = 10 m/s²)
Answer: 50 N
Net force in free fall equals the weight: F = mg = 5 kg × 10 m/s² = 50 N.