MCS 6

Uniform motion means:

• a. Acceleration is constant

• b. Speed is constant

• c. Velocity is constant

• d. Displacement is constant

The slope of the best-fit straight line of a velocity-time graph will determine the

• a. Distance of the object

• b. Speed of the object

• c. Velocity of the object

• d. Acceleration of the object e. Displacement of the object

A hockey puck has a mass of 150g and is sliding south along the ice and slows at a rate of 1.2𝑚/𝑠 2What is the net force acting on the puck?

• a. 180N[N]

• b. 180N[S]

• c. 18N[N]

• d. 0.18N[N] e. 0.18N[S]

In which case below is work NOT being done?

• a. Pushing a car a distance of 0.5m

• b. Playing violin in an orchestra

• c. Pushing against a solid concrete wall

• d. Gliding to stop on roller skates e. Walking down a flight of stairs

Which of the following accurately describes what happens to a wave after a reflection

• a. A crest will be reflected as a trough but with a smaller amplitude

• b. A crest will be reflected as a crest but with a smaller amplitude

• c. A crest will be reflected as a crest but with a larger amplitude

• d. A crest will be reflected as a trough but with the same amplitude

The law of conservation of energy says that

• a. Energy can be created but not destroyed

• b. Energy cannot be created or destroyed burned

• c. Energy cannot be transformed

• d. Energy cannot be created but can be destroyed e. Energy can only be

The specific heat capacity of iron is 450J/(𝑘𝑔 ∗ 𝑂 𝐶). What quantity of heat is required to raise the temperature of 5.0kg of iron from 10𝑂𝐶 𝑡𝑜 40℃

• a. 90000J

• b. 67500J

• c. 3.0J

• d. 22500J e. 75J

If you launch a ball horizontally out of a window at the same time you drop a ball, which of the following things will happen?

• a. Both balls will hit the ground at the same time

• b. The ball that was dropped will hit the ground first

• c. The ball that was launched horizontally will hit the ground first

• d. The ball that was launched horizontally will slow down. e. The ball that was dropped will slow down

The force of surface friction acting on an object depends on which of the following:

• a. The surface area of the object

• b. The mass of the object c.

• The volume of the object

• d. The shape of the object

What does this circuit symbol represent?

• a. Cell

• b. Switch

• . c. Wire d

• . Resistor .