Science Force and motion Flashcards
A single force constantly applied can cause constant, uniform motion.
False
All other forces (air resistance, etc) considered equal, a ball with a large mass and a ball with a small mass dropped at the same time:
Both balls will hit the ground at approximately the same time as the increased weight pulling down on the large ball is cancelled by its increased inertia.
All other forces (air resistance, etc) considered equal, a ball with a large mass and a ball with a small mass dropped at the same time:
Both balls will hit the ground at approximately the same time as the increased weight pulling down on the large ball is cancelled by its increased inertia.
A cart in motion down the hall (with no one touching it) could have
Gravity, normal force, and a frictional force, and a slanted velocity graph
When the fan cart is pushed so that it rolls backwards
force applied > force of fan
A force will cause an object at rest to move if:
If the force is greater than the sum of all resistive forces.
If an object has 2 equal and opposite forces on it, it must be at res
False
A ball is thrown upwards into the air. We will call the part of its path going up (A), the top of its path (B), and its path down (C). The force of gravity is:
Virtually the same everywhere.
The velocity vs. time graph of a non-moving object would look like…
a horizontal line at zero
A yo-yo swung at a constant speed in a circle around one’s head is …
Moving with a constant acceleration
When a cart goes down, turns around, and comes back:
Right where it turns around
Its velocity is zero
A cart hanging from a spring scale has
2 forces, the force of the scale and gravity
A cart on a ramp would have
Normal force perpendicular to the ramp
A cart on a ramp rolling freely down the ramp woudl have (and do not ignore friction
3 Forces
2 opposite forces always cancel out and cause no change in motion.
False
