G7 Advanced End of Term 3 Practice Questions

Flashcards covering key concepts from the G7 Advanced End of Term 3 Practice Questions.

What is needed to determine an object's location?

A reference point.

What is the definition of speed?

The rate at which someone or something is able to move or operate.

If a student pushes on a wall with a force of 30 N, what is the force with which the wall pushes on the student?

30 N (equal and opposite reaction)

The net force acting on a car of 2100 kg is 8400 N. What is the magnitude of the acceleration of the car?

4 m/s^2 (using F=ma)

A student stands on a bathroom scale, and the reading is 50 kg. What is the mass of the student, and in what units is mass measured?

Mass = 50 kg, units are kilograms (kg)

A student stands on a bathroom scale, and the reading is 50 kg. What is the weight of the student, and in what units is weight measured?

Weight = 490 N (50 kg * 9.8 m/s^2), units are Newtons (N)

Two objects, A and B, have the same mass. What happens to the gravitational force if the mass of A is increased?

The force on A and B increases.

Two objects, A and B, have the same mass. What happens to the gravitational force if the mass of A is decreased?

The force on A and B decreases.

Two objects, A and B, have the same mass. What happens to the gravitational force if the mass of B is decreased?

The force on A and B decreases.

Which of the following vehicles has the largest kinetic energy: a 500 kg car at 57 km/h, a 1000 kg car at 0 km/h, a 1500 kg car at 57 km/h, or a 2500 kg car at 0 km/h? Explain.

The 1500 kg car at 57 km/h has the largest kinetic energy because kinetic energy depends on both mass and speed (KE = 1/2 * m * v^2).

What does the acronym ICON stand for when referring to magnetic materials?

I for Iron, CO for Cobalt, and N for Nickel

At what position will a ball have the greatest gravitational potential energy?

At the highest position.

At what position will a ball have the lowest gravitational potential energy?

At the lowest position.

Where is the force of a bar magnet the strongest?

At the poles.

Where is the force of a bar magnet the weakest?

In the middle.

What is a force?

A push or pull upon an object resulting from the object's interaction with another object.

What type of force is weight, normal force, and friction: contact or non-contact?

Weight: Non-contact, Normal: Contact, Friction: Contact

State the law of conservation of energy.

Energy cannot be created or destroyed, but it can be transferred from one form to another.

What is the speed of a swing at its highest positions (A and E)? Explain your answer.

The speed is zero at positions A and E because all the energy is in the form of potential energy at these points.

What is the region around a magnet where the magnetic forces act?

Magnetic field

When an object that is made of magnetic material but is not a magnet comes in contact with a magnet, what happens?

Its magnetic domains fall into alignment and it begins to attract other objects made of magnetic material.