IB Physics: Describing Motion

Ava, Aarav, and Priya are in a physics class. Their teacher asks them to define kinematics. Ava says it's the study of the interaction between matter and energy. Aarav argues it's the branch of physics that deals with the behavior of light. Priya, however, insists it's the branch of physics that deals with the motion of objects without considering the forces that cause the motion. Who gave the correct definition?

• The study of the interaction between matter and energy.

• The branch of physics that deals with the behavior of light.

• The branch of physics that deals with the motion of objects without considering the forces that cause the motion.

• The study of the properties and behavior of matter.

Isla, Aarav, and Leo are participating in a school marathon! They're trying to understand the three basic quantities that describe their motion during the race. Can you help them out?

• displacement, velocity, and acceleration

• position, time, and speed.

• force, momentum, and energy.

• speed, time, and distance.

Jacob, Noah, and Freya decided to have a race. They measured the total distance they ran and the total time it took. How would they calculate their average speed?

• Average Speed = Total Distance - Total Time

• Average Speed = Total Distance + Total Time

• Average Speed = Total Distance / Total Time

• Average Speed = Total Distance x Total Time

Amelia, Isabelle, and Harry are participating in a race. If we want to calculate Amelia's average velocity, which equation should we use?

• Average velocity = (Amelia's final position) / (Amelia's initial position).

• Average velocity = (Amelia's change in position) / (change in time)

• Average velocity = (change in time) / (Amelia's change in position).

• Average velocity = (Amelia's change in position) * (change in time).

Oscar is learning about physics and he is trying to understand how to calculate acceleration. He knows that acceleration has something to do with the change in velocity over time. Can you help him figure out the correct equation for calculating acceleration?

• acceleration = (final velocity + initial velocity) / time.

• acceleration = (final velocity - initial velocity) / time

• acceleration = (final velocity * initial velocity) / time.

• acceleration = (final velocity - initial velocity) * time.

Priya and Ishaan are having a discussion about their physics homework. Priya says that speed and velocity are the same thing, but Ishaan disagrees. Can you help them understand the difference between speed and velocity?

• Speed is a measure of how fast Priya can run in a race, while velocity is a measure of how far Ishaan can throw a ball in a certain direction.

• Speed is like how fast Chloe can ride her bike, velocity is like the direction in which Ishaan throws a frisbee.

• Speed is always positive, like the speed of Priya's car, while velocity, like the direction of Ishaan's thrown ball, can be positive or negative depending on the direction of motion.

• Speed does not take into account the direction of Chloe's bike ride, while velocity includes both how fast Ishaan can throw and in which direction.

Rosie and James decided to have a race. Rosie took a straight path from the start to the finish line, while James took a longer, winding path. Mia, who was watching, wondered what the difference was between the total path James traveled (distance) and the straight path Rosie took (displacement). Can you help Mia understand the difference?

• Distance is a scalar quantity, while displacement is a vector quantity.

• Distance is the total length of the path traveled, while displacement is the shortest distance between the initial and final positions.

• Distance is the longest distance between two points, while displacement is the shortest distance between two points.

• Distance is measured in meters, while displacement is measured in kilometers.

Benjamin is driving his car with an initial velocity. He then accelerates for a certain period of time. What is the equation to calculate Benjamin's final velocity?

• final velocity = initial velocity + (acceleration * time)

• final velocity = initial velocity / (acceleration * time)

• final velocity = initial velocity * (acceleration * time)

• final velocity = initial velocity + (acceleration * distance)

Ava is at a park and she walks from the entrance to the playground. If Ava's final position is the playground and her initial position is the entrance, what is the equation to calculate Ava's displacement?

• displacement = final position - initial position

• displacement = final position + initial position

• displacement = final position * initial position

• displacement = final position / initial position

Sophie, Amelia, and Isabella are planning a road trip. If they know the distance they have to travel and the speed at which they will be driving, which equation should they use to calculate the time it will take for their trip?

• time = distance / speed

• time = speed * distance

• time = speed / distance

• time = distance + speed