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.
Which answer best describes displacement?
Displacement is best described as the change in position or the shortest distance between the initial and final positions of an object, taking into account both magnitude and direction.
Kelley is playing pool and hits the cue into the nine ball, which is directly in the center of the pool table. The nine ball travels a total of 7 meters before stopping, 1 meter to the left of the initial starting point of the nine ball. Which sentence reflects the correct statement regarding distance and displacement when considering the motion of the nine ball?
The correct statement regarding distance and displacement when considering the motion of the nine ball is: The distance traveled by the nine ball is 7 meters, while the displacement of the nine ball is 1 meter to the left of its initial starting point.
What is velocity
Velocity is a vector quantity that describes the speed and direction of an object's motion. It is defined as the rate of change of displacement with respect to time, and it is measured in units of distance per time, such as meters per second (m/s).
Imagine a time-position graph where the velocity of an object is constant. What will be observed on the graph concerning the slope of the line segment as well as the velocity of the object?
On a time-position graph where the velocity of an object is constant, the slope of the line segment will be a straight line with a constant value. The slope represents the velocity of the object, so a constant slope indicates that the velocity remains unchanged over time.
Select the option that best summarizes the reason for the use of position-time graphs when studying physical science.
Position-time graphs are used in studying physical science as they provide a visual representation of an object's motion over time, allowing for the analysis of position, displacement, velocity, and acceleration and enabling the interpretation of various aspects of an object's movement.
Which option describes a vector quantity?
A vector quantity is described as a physical quantity that has both magnitude and direction. Examples of vector quantities include displacement, velocity, acceleration, force, and momentum.
Which quantity is scalar?
A scalar quantity is a physical quantity that only has magnitude and no specific direction. Examples of scalar quantities include time, mass, temperature, distance, speed, and energy.
