Paper 3 Collisions Between Small Spheres

What is momentum?

• The product of an object's mass and velocity

• The sum of an object's mass and velocity

• The difference between an object's mass and velocity

• The ratio of an object's mass to its velocity

What happens to momentum in a collision?

• It is always conserved

• It is always lost

• It is always gained

• It is always doubled

How could the diameter of a sphere be measured?

• Using a screw gauge micrometer or a vernier caliper

• Using a ruler or a protractor

• Using a thermometer or a barometer

• Using a compass or a divider

How can you determine whether momentum is conserved using momentum vectors?

• By measuring the angles between the vectors.

• By constructing a momentum vector triangle.

• By calculating the magnitude of each vector.

• By checking if the vectors are parallel.

What indicates that momentum is conserved when using momentum vectors?

• The vectors form a straight line.

• The vectors form a closed triangle.

• The vectors are perpendicular.

• The vectors have equal magnitudes.

When using the velocity overlay feature on Tracker, how can you analyze momentum?

• By dividing the velocities by time

• By multiplying the velocities by mass

• By adding the velocities together

• By subtracting the velocities from mass

What two pieces of information about the velocities do you need to record?

• Magnitude and speed

• Magnitude and direction

• Speed and direction

• Speed and distance

Why should the surface be slightly angled?

• To reduce friction between the spheres and the surface.

• To increase friction between the spheres and the surface.

• To make the spheres move faster.

• To make the spheres move slower.

Why may glass marbles not be suitable for an experiment?

• They are too heavy.

• They are too expensive.

• The edges of a glass marble may not be clear when recorded on a camera.

• They are too fragile.

How should the camera be positioned to catch the tracks of the spheres both before and after the collision?

• The camera should be positioned at a high angle.

• The camera should be positioned at a low angle.

• The camera should be positioned so that it has a wide enough field of view.

• The camera should be positioned very close to the spheres.