Grade 9 Science Summative Test

Front

What is the shape of the path followed by a sepak takraw ball when kicked from a height of two meters?

Back

Parabolic

Front

What type of motion does an object experience when moving under constant acceleration?

Back

Uniformly accelerated motion

Front

Why does the horizontal motion of a projectile remain constant?

Back

No external force acts on it horizontally.

Front

Which statement is NOT true about vertical motion in projectile motion?

• Vertical acceleration remains constant.
• Vertical velocity changes over time.
• Gravity influences vertical velocity.
• Vertical acceleration is zero at the highest point.

Back

Vertical acceleration is zero at the highest point.

Front

What happens to the velocity of a freely falling object every second in the absence of air resistance?

Back

It increases by 9.8 m/s.

Front

What best describes the horizontal motion of a projectile?

Back

It remains constant.

Front

What happens to the speed of a volleyball served at an angle when it is received at the same height?

Back

It remains the same.

Front

When a ball is thrown straight up, how does its velocity change due to gravity?

Back

It decreases as it moves upward.

Front

A firefighter adjusts a water hose to maximize the horizontal distance the water reaches. Based on projectile motion principles, what angle should be used?

Back

45°

Front

A student investigates how launch angles affect projectile motion. After multiple trials, they find that higher angles increase the height of the projectile but decrease its range. What conclusion can be drawn from this observation?

Back

There is a trade-off between height and range.