CH X Physics - 22 March

• a

• b

• c

• d

Wind energy

• is less expensive than fossil fuels

• is difficult to utilize in areas with low wind availability

• is a renewable source of energy

• utilizes small or large areas of land not previously used

Select ALL the options that are fossil fuels.

• coal

• oil

• nuclear energy

• natural gas

Complete the following statement: The farther away two planets are the _______ the gravitational force between them.

• more
• same
• dosen't matter
• less

The purple arrow shows speed and direction of the ball. This arrow is called __________.

• a force arrow

• a vector

• an acceleration arrow

• a speed arrow

What is the independent variable on this graph?

• Both flow time (s) and temperature (°C) are independent variables.

• Only temperature (°C) is the independent variable.

• Only flow time (s) is the independent variable.

If an atom loses electrons, the charge will be positive.

• true

• false

What is the direction of the acceleration at point A, if the ball is revolving clockwise?

• up
• right
• down
• left

In which direction does friction force act?

• Direction opposite of object's motion.

• In same direction as object's motion.

• Up direction.

• Down direction.

Bruno the bat has a mass of 0.58 kg and flies at a speed of 0.8 m/s in circle of radius 0.5 m. What is his acceleration?

• 0.25 m/s²

• 1.3 m/s²

• 1.6 m/s²

• 0.74 m/s²