Physics Final Exam Review

Which of the following demonstrates acceleration?

• A bike moving at 20 km/h, then slowing down to 15 km/h.

• A bike moves at a constant speed of 25 km/h.

• A bike speeds up from 10 km/h to 15 km/h.

• A bike turns left while traveling at 20 km/h.

• A bike continues straight without turning.

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A motorbike is reducing its speed steadily from 18 m/s to come to a stop. The acceleration is -3 m/s². How much time will it take to stop?

• 6 seconds

• 3 seconds

• 9 seconds

• 24 seconds

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A fox travels 3 miles east, then 8 miles north, then 5 miles south. What is the displacement of the fox?

• 12.8 miles southeast

• It has returned to its starting point.

• 4.24 miles northeast

• 5.6 miles south

A basketball is thrown with an initial speed of 30.0 m/s at an angle of 30 degrees above the horizontal. The ball lands at the same height as it was thrown. What can you say about the final speed of the ball?

• The ball’s final speed is half of its initial speed.

• The final speed does not depend on the height where the ball lands.

• The final speed is equal to the initial speed of 30.0 m/s.

• There’s no way to determine the final speed of the ball.

A soccer ball is kicked into the air. What happens when the ball reaches its highest point?

• It momentarily stops before starting to fall.

• It moves horizontally for an instant.

• It moves vertically for an instant.

• It is moving fastest in the upward direction.

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When a projectile reaches the peak of its trajectory, what is the direction of the vertical component of its velocity?

• Upward

• There is no vertical velocity at the peak.

• Downward

• It is zero throughout the projectile’s motion.

Three projectiles were launched from a cannon. Projectile A landed the closest to the cannon then B then C landed the furthest away. Which projectile had the least initial velocity?

• A

• B

• C

• All projectiles had the same initial velocity.

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A stone is thrown horizontally from a 2-meter-high cliff at 25.0 m/s and lands 50.0 meters away. How long was the stone in the air?

• 2.00 s

• 3.50 s

• 1.56 s

• 4.00 s

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What causes acceleration?

• Speed

• Inertia

• Force

• Velocity

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A person pushes a crate with a force of 30 N. The mass of the crate doubles, but the force applied remains the same. How does the acceleration of the crate change after the mass is doubled?

• Acceleration is doubled.

• Acceleration is four times.

• Acceleration is 1/2.

• Acceleration is 1/4.

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