Grade9_4th Quarter Summative Quiz

Quiz by Rizzel Joy Dotillos

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40 questions
• Q1

When an object is launched into the air, it follows a path known as trajectory. What is the shape of the path followed by a projectile neglecting air resistance?

Straight upward

Asymmetric Line

Ellipse

Parabola

30s
• Q2

One player throws the ball up and scored a point. As you watch the ball fly, you notice that it travels a certain distance horizontally. What is the term for the horizontal distance a ball travels during its flight?

Displacement

Trajectory

Altitude

Range

30s
• Q3

There are many real-life scenarios where projectile motion can be observed. Which situation below shows the BEST example of a projectile motion?

An aluminum can dropped into the recycling bin

A bullet being fired from a gun

A space shuttle orbiting Earth

A jet lifting off a runway

30s
• Q4

In projectile motion, it is often assumed that air resistance is negligible so that the only force acting on the object is gravity. What will happen to the projectile when there is air resistance?

Air resistance can only slow down the projectile in motion.

Air resistance can slow down a projectile and change its trajectory.

Air resistance has no effect on projectile motion.

Air resistance can speed up a projectile and change its trajectory.

30s
• Q5

If a freely falling ball is somehow equipped with a speedometer, by how much would its speed-reading increase for every second?

0 m/s2

9.8 m/s2

20 m/s2

10 m/s2

30s
• Q6

At the top of a building 125 meters high, a dense ball is shot horizontally such that its initial velocity is 20 m/s. How much time elapse before the ball strikes the ground?

8 seconds

6 seconds

7 seconds

5 seconds

30s
• Q7

The angle at which the object is launched is called the angle of release. How does the angle of release affect the height of a projectile?

The greater the angle of release, the greater the height of the projectile.

The relationship between the angle of release and the height of a projectile is unpredictable.

The greater the angle of release, the lower the height of the projectile.

The angle of release has no effect on the height of the projectile.

30s
• Q8

A ball is hit at an angle of 30⁰. At what point in its trajectory does this projectile have the least velocity?

Just before it hits the ground.

At the highest point of its flight.

Just after it was launched.

Halfway between the ground and the highest point.

30s
• Q9

You’re playing baseball with a friend and want to hit the ball to go as far as possible. Ignoring air resistance, at what angle should you hit the ball for maximum distance?

45⁰

90⁰

40⁰

50⁰

30s
• Q10

While watching children play with a ball at a park, you notice that the ball reaches different heights depending on the angle at which it is thrown. At what angle of release does the ball reach its maximum height in simple projectile motion?

when θ = 45⁰

when θ = 90⁰

when θ = 0⁰

when θ = 60⁰

30s
• Q11

A football is kicked at an angle of 25⁰ and travels 50 yards. If the football is kicked at the same speed, what other angle will allow the football to travel 50 yards?

45⁰

75⁰

55⁰

65⁰

30s
• Q12

During a basketball game, a player throws the ball towards the hoop. Considering the horizontal and vertical velocity components of the ball’s motion, what happens to its vertical velocity during its flight?

It changes direction due to gravity.

It remains constant because gravity only affects horizontal motion.

It increases due to gravity.

It decreases due to gravity until it reaches its maximum height, then increases again as it falls back down.

30s
• Q13

A cargo truck with a mass of 10,000 kilograms and a small car with a mass of 2000 kilograms, both traveling at 40 km/hr suddenly lose their brakes and crash. Which would cause more damage and why?

Both vehicles would cause the same amount of damage because they are traveling at the same velocity.

The small car would be more damaging because it has less mass.

The cargo truck would be more damaging because it has more mass.

The cargo truck would be more damaging because it is bigger.

30s
• Q14

Linear momentum is a measure of how difficult it is to change an object’s motion. What two factors are used to calculate an object’s linear momentum?

Mass and velocity

Force and time

Mass and volume

Force and velocity

30s
• Q15

Two 0.5 kg balls approach each other in opposite direction with the same speed of 1.0 m/s. What is the total momentum of the system before collision?

0.50 kg.m/s

1.0 kg. m/s

0 kg. m/s

-1.0 kg. m/s

30s

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