Kinematics of Projectile Motion Quiz

What is a projectile?

• A body in free fall subject only to gravity and air resistance

• A body moving at a constant speed

• A body at rest

• A body accelerating due to air resistance

What factors influence the trajectory of a projectile?

• Time of day

• Projection angle, projection speed, and relative projection height

• Color of the projectile

• Temperature and humidity

Why do we analyze the horizontal and vertical components of projectile motion separately?

• Vertical component is influenced by gravity, while the horizontal component is not

• It is a tradition in physics

• To confuse students

• It makes the calculations easier

What is the effect of gravity on a projectile?

• Increases the horizontal velocity

• Decreases the vertical velocity

• Has no effect on the projectile

• Produces a constant acceleration of -9.81 m/s^2 or -32.2 ft/s^2 downward

Which angle is considered optimum for maximizing the range of a projectile?

• 60 degrees

• 30 degrees

• 90 degrees

• 45 degrees

What is the equation used to calculate displacement, velocity, acceleration, and time in constant acceleration?

• x = vt, F=mg, E=hf

• v^2 = v1 + at, d = v1t + 1/2at^2, v2^2 = v1^2 + 2ad

• p = mv, F=ma, E=mc^2

• E=mc^2, F=ma, a^2 + b^2 = c^2

What is the pattern of change in the vertical velocity of a projectile?

• Symmetrical about the apex, decreases as the ball rises and increases as it falls

• Linear increase throughout the flight

• Exponential decrease throughout the flight

• Constant velocity throughout the flight

How is the horizontal component of velocity calculated?

• vH = vR / sin θ

• vH = vR / cos θ

• vH = vR * sin θ

• vH = vR * cos θ

What type of quantity is displacement?

• Matrix

• Tensor

• Vector

• Scalar

What does the resultant and angle of a vector variable represent?

• Calculated from its horizontal and vertical components using trigonometry

• Calculated from its magnitude and direction using algebra

• Calculated from its speed and time using calculus

• Calculated from its acceleration and mass using physics laws