FOURTH PERIODIC EXAMINATION IN SCIENCE

Which one of the following graphs represents uniform motion?

What is the horizontal distance traveled by a projectile motion?

• Height

• Projectile

• Trajectory

• Range

What is the curved path taken by the projectile motion?

• Trajectory

• Upward

• Horizontal path

• Downward

In a frame exhibiting a uniformly accelerated motion, which of the following quantities is constant?

• acceleration

• speed

• velocity

• time

Objects at free fall exhibit uniformly accelerated motion. If you throw a baseball straight up, what will its vertical velocity be at the highest point?

• 0 m/s

• 9.8 m/s

• 0 m/s2

• -9.8 m/s2

Which is described as the combination of a constant horizontal motion and free fall?

• Inertia

• Momentum

• Projectile

• Energy

Which component of a projectile is constant?

• Horizontal velocity

• Vertical velocity

• Range

• Angle of trajectory

A projectile is launched at an angle of 30oabove the horizontal. Neglecting air resistance, what are the projectile's horizontal and vertical accelerations while it reaches its peak?

• Both the horizontal and vertical accelerations are 9.8 m/s2.

• Both the horizontal and vertical accelerations are zero.

• The horizontal acceleration is zero and the vertical acceleration is -9.8 m/s2.

• The horizontal acceleration is 9.8 m/s2 and the vertical acceleration is zero.

At what angle should a water hose be intended for the water to land with the greatest range?

• 0°

• 45°

• 60°

• 90°

A ball is thrown at angle of 38o with respect to the horizontal. What happens to the magnitude of the ball's vertical velocity during the time interval that the ball is in the air?

• It remains the same.

• It increases upward, then decreases downward.

• It decreases upward, then increases downward.

• It decreases upward, then remains the same downward.