Quiz on Inertia and Motion
An object covers a distance of 8 meters in the first second of travel, another 8 meters during the next second, and 8 meters again during the third second. Its acceleration in meters per second per second is approximately
0
The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is
10N
A car accelerates at 2 meters per second per second. Assuming the car starts from rest, how much time does it need to accelerate to a speed of 30 m/s?
15 seconds
If a projectile is fired straight up at a speed of 10 m/s, the total time to return to its starting position is about
2 seconds
A horse gallops a distance of 10 kilometers in a time of 30 minutes. Its average speed is
20 km/h
If a freely falling object were somehow equipped with a speedometer on a planet where the acceleration due to gravity is 20 m/s/s, then its speed reading would increase each second by
20 m/s
Ten seconds after starting from rest, a car is moving at 40 m/s. What is the car's acceleration in meters per second per second?
4.0
Hang from a pair of gym rings and the upward support forces of the rings will always
add up to equal your weight
When you stand at rest on a pair of bathroom scales, the readings on the scales will always
add up to equal your weight
If an object moves with constant acceleration, its velocity must
change by the same amount each second
A truck is moving at constant velocity. Inside the storage compartment, a rock is dropped from the midpoint of the ceiling and strikes the floor below. The rock hits the floor
exactly below the midpoint of the ceiling
Whereas Aristotle relied on logic in explaining nature, Galileo relied on
experiment
If an object falling freely were somehow equipped with an odometer to measure the distance it travels, then the amount of distance it travels each succeeding second would be
greater than the second before
If your automobile runs out of fuel while you are driving, the engine stops but you do not come to an abrupt stop. The concept that most explains why is
inertia
Twelve seconds after starting from rest, an object falling freely will have a speed of
more than 100 m/s
An object in mechanical equilibrium is an object
moving with constant velocity, having no acceleration, and at rest
When a rocket ship accelerating in outer space runs out of fuel, it
no longer accelerates
A ball is thrown upwards and returns to the same position. Compared with its original speed after release, its speed when it returns is about
the same
A car maintains a constant velocity of 100 km/hr for 10 seconds. During this interval its acceleration is
zero
A hockey puck is set in motion across a frozen pond. If ice friction and air resistance are neglected, the force required to keep the puck sliding at constant velocity is
zero
