SCIENCE 9 - REVIEW

The acceleration due to gravity acts __________.

• upward

• downward

• toward the outer space

The horizontal component of a projectile's velocity is independent of _______.

• displacement

• range

• time

• vertical component

A golf ball is thrown into the air. At the highest point, the ball has zero velocity and zero acceleration.

• TRUE

• FALSE

What is the shape of the path of any projectile?

• diagonal

• hyperbola

• parabola

• vertical

If you are trying to find the horizontal component (Vx) of a projectile's velocity, what trigonometry function would you use?

• sine

• cosine

• tangent

What is the vertical acceleration of any projectile?

• 9.8 m.s^2

• -9.8 m.s^2

• It depends on the angle of launch

• It depends on the launch velocity

The only force acting on the object in projectile motion is _________.

• acceleration

• air resistance

• friction

• gravity

Which launch angle will result in the longest range?

If you throw a baseball straight up, what is its acceleration at the highest point?

• 9.8 m/s

• 9.8 m/s²

• 0 m/s²

• 0 m/s

If a ball is thrown horizontally from the top of a 125-m cliff, how long will it be in the air?

• 5.5 s

• 5.20 s

• 5.05 s

• 25 s