The force required to move a ping pong ball is less than the force required to move a bowling ball due to the difference in mass between the two objects.
In 1-2 sentences, explain the difference between the velocity and acceleration of an object.
Velocity refers to the rate of change of an object's displacement over time, while acceleration refers to the rate of change of an object's velocity over time.
Students are using the experimental setup shown in the image in which the two ends of a string are attached to a car and to a hanger. The students conduct three trials in which they place metal discs on the hanger to manipulate the force applied to the car. As a result, the car accelerates along the table while two probes collect motion data.
On the fourth trial of this experiment, a student places some discs on the car by mistake. In 1-2 sentences, explain how this would this change the acceleration or velocity?
Placing discs on the car in the fourth trial would increase the mass of the car, therefore requiring more force to accelerate and potentially reducing the acceleration or velocity achieved compared to previous trials.
In one or two sentences, make a hypothesis about whether or not it is easier to start the box moving on a frictionless surface than to keep it moving on a rough surface.
It is hypothesized that it would be easier to start the box moving on a frictionless surface than to keep it moving on a rough surface, as the absence of friction on the frictionless surface would reduce the initial resistance to motion.
In 3-5 sentences, summarize the balanced forces that are present when a soccer ball is resting on the ground, and the unbalanced forces that are present when a soccer ball is kicked and moves through the air or rolls on the ground
When a soccer ball is resting on the ground, the forces acting on it are balanced, meaning that the downward force of gravity is equal and opposite to the upward force exerted by the ground, resulting in no net force. On the other hand, when a soccer ball is kicked and moves through the air or rolls on the ground, unbalanced forces come into play. A kick applies an external force to the ball, causing it to accelerate and move. In the air, drag force opposes the motion, while the force of gravity acts vertically downward. Rolling on the ground introduces friction as an additional force that opposes the motion of the ball.
