Periodic Test in Science 9

Which of the following best describes the horizontal motion of a projectile?

• The horizontal motion is constant.

• The horizontal motion is accelerated.

• The horizontal motion is influenced by air resistance.

• The horizontal motion is independent of the vertical motion.

What happens to the vertical velocity of a projectile as it reaches the highest point of its trajectory?

• It becomes zero.

• It increases.

• It decreases.

• It remains constant.

The motion of an object with constant acceleration is also known as

• Motion

• Uniform Motion

• Uniformly Accelerated Motion

• Constant Motion

A ball is thrown horizontally from a cliff. Which of the following statements is true regarding its motion?

• The ball will fall straight down.

• The ball will continue to move horizontally at a constant speed.

• The ball will curve downward due to air resistance.

• The ball will fall downward while moving horizontally at a constant speed.

A ball is launched at an angle of 45 degrees with respect to the horizontal. Which of the following will have the greatest impact on the maximum height reached by the projectile?

• The initial velocity of the ball.

• The angle at which the ball is launched.

• The mass of the ball.

• The presence of air resistance.

Which of the following angles of release will result in the maximum range for a projectile?

• 0 degrees

• 45 degrees

• 90 degrees

• It depends on other factors, not the angle of release.

What happens to the range of a projectile when the angle of release is increased beyond 45 degrees?

• The range increases.

• The range decreases.

• The range remains the same.

• It depends on other factors, not just the angle of release.

A ball is thrown vertically upward. What is its instantaneous speed at its maximum height?

• 0

• 5 m/s

• 9.8 m/s

• 9.8 m/s2

A sepak takraw that is kicked from a height of two meters follows a path that is _______________.

• Circular

• Linear

• Hyperbolic

• Parabolic

Which of the following quantities is a measure of an object's momentum?

• Speed

• Acceleration

• Force

• Mass