Velocity and Gravity Flashcards
7 cards from real Bennett Mechanical Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Velocity and Gravity flashcards as text
Two identical balls are dropped, one from 10 m and one from 20 m. Which hits the ground at a higher speed?
Answer: The one from 20 m
A longer fall allows gravity to accelerate the ball for more time, giving a higher impact speed.
What is the acceleration of an object at the moment it is released from rest and begins to fall?
Answer: About 9.8 m/s²
Gravity acts immediately, so the object accelerates at about 9.8 m/s² from the start.
A car going around a circular track at constant speed is accelerating because what is changing?
Answer: Its direction
Changing direction changes velocity, which means the car is accelerating even at constant speed.
An astronaut on the Moon drops a hammer and a feather together. What happens?
Answer: They land together
With no air on the Moon, both fall at the same rate and land together.
A ball rolls off a 5 m high table. Roughly how long is it in the air before hitting the floor?
Answer: About 1 second
Using t = √(2h/g) = √(10/10) ≈ 1 second.
If an object's velocity is negative, what does this typically indicate?
Answer: It is moving in the opposite reference direction
A negative sign on velocity indicates motion in the direction opposite the chosen positive direction.
Compared to a fall on Earth, how would the same drop behave on a planet with twice Earth's gravity?
Answer: Faster fall
Stronger gravity means greater acceleration, so the object falls faster.