Understanding Vectors and Projectiles

What is the primary force acting on a projectile in motion?

• Friction

• Gravity

• Magnetic force

• Air resistance

In a vector diagram, what does a constant horizontal arrow indicate?

• Constant horizontal velocity

• Constant vertical velocity

• Changing horizontal velocity

• Changing vertical velocity

How does gravity affect the vertical velocity of a projectile?

• It increases by 9.8 m/s every second

• It is unaffected by gravity

• It decreases by 9.8 m/s every second

• It remains constant

What happens to the vertical velocity of a projectile at its peak?

• It is at its maximum

• It is zero

• It is at its minimum

• It is equal to the horizontal velocity

If a projectile takes 3 seconds to reach its peak, how long will it take to return to the ground?

• 1.5 seconds

• 3 seconds

• 9 seconds

• 6 seconds

What is the total time in the air for a projectile with an initial vertical velocity of 40 m/s?

• 4 seconds

• 8 seconds

• 10 seconds

• 12 seconds

Which trigonometric function is used to calculate the horizontal component of a projectile's velocity?

• Cosine

• Cotangent

• Sine

• Tangent

If a projectile is launched at 40 m/s at an angle of 30 degrees, what is the vertical component of its velocity?

• 40 m/s

• 35 m/s

• 20 m/s

• 30 m/s

What is the effect of using a value of -10 m/s² instead of -9.8 m/s² for gravity in calculations?

• Increased precision

• Decreased precision

• Increased complexity

• No effect

How can you calculate the time a projectile is in the air if you know its initial vertical velocity?

• Multiply by 9.8 m/s²

• Divide by 9.8 m/s²

• Multiply by 10 m/s²

• Divide by 10 m/s²