Science 9 Long Test #1 _ 4th Quarter

Which statement is TRUE about an object in uniformly accelerated motion? I. Velocity is not constant. II. Acceleration is not zero. III. Acceleration changes slowly. IV. Velocity changes at constant intervals of time.

• A. I, II, and IV

• B. I, II, and III

• C. II, III, and IV

• D. I, III and IV

An apple is dropped while a volleyball is thrown horizontally. Which of the following is TRUE?

• The velocities are equal.

       

• The two objects will hit the ground at the same time.

    

•     Gravity acts less on the apple because it is moving faster.

       

• The acceleration due to gravity is greater for volleyball because it is heavier.

How does the angle of release affect the height in a projectile motion?

• A. The angle of release does not affect the height of the projectile.

• The lesser the angle releases the higher the height of projectile motion.

• The greater the release angle, the higher the projectile motion height.

• The height of projectile motion is at its maximum if the angle is less than 45°.

A basketball player has thrown the ball at an angle of 30° and travels 10.0 m. If the ball is thrown at the same speed, at what angle will the ball be allowed to travel 10.0 m?

• 40°

• 50°

• 60°

• 70°

Which of the following statements is TRUE about momentum?

I.  Its basic unit is kg.m/s           

II.  A body at rest has zero momentum       

III.  It is the product of mass and velocity

• I and II

• II and III

• I and III

• I, II, and III

Which of the following is TRUE about the impulse acting on a body and its change in momentum?

• Impulse is equal to the change in momentum.

       

• Impulse is less than the change in momentum.

     

• Impulse is greater than the change in momentum.

• There is no relation between impulse and change in momentum.

You are a beginner basketball player, and throwing the ball to reach the ring is hard. What must you do?

• Position your hand in 45° angle before shooting the ball.

• Position you hand in a greater angle before shooting the ball.

• Position your hand in which it will have a lesser angle to release the ball.

• The angle of the position of your hand before shooting the ball has nothing to do with the height of the ball's trajectory.

Based on the illustration what does H show?

• Height

• Range

• Trajectory

• Velocity

As shown in the figure, two identical cars are moving at different speeds and colliding with a tree. Car A caused greater damage to the tree than Car B. Why is this so?

• Car A is moving faster; therefore, its impact force is higher.

• Car A is moving slower; therefore, its impact force is higher.

• Car B is heavier than Car A, so it creates less damage.

• Car A is lighter than Car A, so it creates greater damage.

The velocity of a truck changes from 3 m/s to 5 m/s in 5 seconds. What is the acceleration of the truck in m/s²?

• A. 0.4 m/s²

• B. 0.5 m/s²

• C. 40 m/s²

• D. 50 m/s²