Grade 9 Summative Assessment.docx

STO. TOMAS NATIONAL HIGH SCHOOL GRADE 9 SCIENCE UNIT 4 MODULE 1 FORCES AND MOTION SUMMATIVE ASSESSMENT Name: ___________________________________________

Score: ________________

Grade level & section: _________________

Date: _________________

I.

MULTIPLE CHOICE. Choose the correct answer from the given choices. Write the letter of your answer on the space provided. 1. Suppose a ping pong ball is tossed. When the ball reaches the highest point, which statement about the ball’ velocity and acceleration is true? a. Both its velocity and its acceleration are zero b. Its velocity is zero and its acceleration is not zero c. Its velocity is no zero and its acceleration is zero. d. Neither its velocity nor its acceleration is zero. 2. The motion of an object with constant acceleration is also known as _________. a. Motion c. Constant Motion b. Uniform Motion d. Uniformly Accelerated Motion 3. If the projectile is the moving object, the curved path they make in mid-air is called? a. trajectory c. intersection b. range d. free-fall 4. A sepak takraw ball is hit vertically upward by a player. What is its acceleration after 1 second? a. 0 c. 9.8 m/s2 2 b. 1 m/s d. -9.8 m/s2 5. What are vectors? a. quantities with magnitude and c. quantities with direction direction d. none of the above b. quantities with magnitude 6. Two cars, one twice heavy as the other, moves down a hill at the same time. The heavier car would have a ___________ momentum. a. Lesser c. Fewer b. Greater d. Smaller 7. A volleyball is tossed vertically upward, with an initial velocity of 5 m/s and caught back at the same level as when it was thrown. What is the velocity of the ball at that point? a. 0 m/s c. -9.8 m/s b. -5 m/s d. -9.8 m/s2 8. Which has more momentum, a heavy truck moving at 30 km/h or a light truck moving at 30 km/h? a. Heavy truck b. Light truck c. Both has the same momentum d. Cannot be determined 9. A ball is hit at an angle of 30 ˚. At what point in its trajectory does this projectile have the least speed? a. Just after it was launched b. At the highest point in its flight c. Just before it hits the ground d. Halfway between the ground and the highest point 10. Momentum ca be defined as.. a. Inertia in motion b. Product of mass and velocity of an object c. Measure of how difficult it is to stop a moving object d. All of the above

II.

STO. TOMAS NATIONAL HIGH SCHOOL GRADE 9 SCIENCE UNIT 4 MODULE 1 FORCES AND MOTION SUMMATIVE ASSESSMENT PROBLEM SOLVING. Solve the following problems involving forces and motion. Show the a) Given b) Find c) Formula and d) Solution. 1. A van from rest accelerates uniformly over a time of 6.34 seconds and covers a distance of 22.9 m. determine the acceleration of the van.

2. A feather is dropped on the moon from a height of 1.40 m. the acceleration of gravity on the moon is 1.67 m/s2. Determine the time for the feather to fall to the surface of the moon.

3. A jeepney with a mass of 3,470 kg is travelling to Green Valley at a rate of 14.2 m/s. On the same road, another jeepney that is 15 kg much heavier is travelling to Green Valley at the same rate. What is the momentum of the 2 jeepney? Which one is more difficult to stop?