Review

Which of the following best describes the velocity of an object?

• 30 m/s

• 30 m/s²

• 30 m east

• 30 m/s east

An object travels with a velocity of 20 m/s in 5 seconds. What is the distance traveled by the object?

• 4 m

• 2.5 m

• 40 m

• 100 m

The impulse experienced by a body is equal to the Change in it's:

• Velocity

• Kinetic energy

• Momentum

• Potential energy

Two identical cars are travelling along EDSA. Wich of the two cars would have a lesser momentum?

• The slower car

• The faster car

• Both have the same momentum

• Cannot be easily determined

A lady tennis player hits an approaching ball with a force of 750 N. If she hits the ball in 0.002 s, how much impulse is imparted to the tennis ball?

• 0 N s

• 1.5 N s

• 3.0 N s

• 6.0 Ns

Which o the following situations best exemplifies the conservation of momentum?

• A ball bouncing off a wall.

• A rocket launching into space.

• A feather falling to the ground.

• A car coming to a stop due to friction.

Which of the following best describes an elastic collision?

• Kinetic energy is conserved.

• Momentum is not conserved.

• Kinetic energy is not conserved

• Momentum and kinetic energy are both conserved.

Which of the following is a device that allows heat transfer from a cold reservoir to a warmer one?

• Heat engine

• Heat pump

• Diesel engine

• Gasoline engine

How does water from the deep we'll move upward?

• It occurs naturally.

• It uses water heat pump.

• It is a spontaneous process.

• It flows from higher temperature to cooler temperature.

A sepak takraw ball is hit vertically upward by a player. What is it's acceleration after 1 second?

• 0

• 1 m/s²

• 9.8 m/s²

• -9.8 m/s²