1. Which Of The Following Does Not Change In Acceleration? A. A Runner Moving At 10kp…

1. Which of the following does not change in acceleration? a. A runner moving at 10kph and suddenly turn right. b. A car moving at 60 kph in a roundabout path. c. An apple that suddenly fall from the tree. d. A rolling ball that stops. 2. What causes an object’s change in velocity? L An increase in object’s acceleration II. A decrease in object’s acceleration III. An object falling from a high building. IV. An object at rest. a. I and II only b. II and III only c. Ill and IV only d. I, II, and Ill only 3. What is the parabolic path followed by a projectile? a. Range b. Trajectory c. Height d. Width 4. Which of the following shows projectile motion? 1. A basketball thrown from the ground to the basket. II. A soccer ball kicked from the top of the clip. III. Rain that falls from the cloud. IV. An electric fan that continues to rotate. b. III and IV only c. I, II, and Ill only d. II, III, and IV only a. I and II only 5.Marble A is rolled off a table from a height of 1 meter at the same exact time Marble B is dropped 1 meter above the ground. Which of the following statements is correct? a. Marble A will hit the ground before Marble B b. Marble B will hit the ground before Marble A c. Both marbles will hit the ground at the same time. d. Not enough information is given to answer the question. 6. Which of the following motions is influenced solely by the acceleration due to gravity? 1. Linear motion II. Projectile motion III. Rotational motion d. II and III only a. I only b. I only c. I and III only 7.What kind of path does a projectile follow when it is kicked from a height of 5 meters? b. parabolic c. circular a. linear d. hyperbolic 8. Neglecting air resistance, what would happen if you were a passenger in a convertible automobile traveling at a constant velocity and threw a ball straight up in the air? a. It would land behind the car. b. It would land in front of the car. c. It would land in the car. d. None of the above 9. A plane traveling at 270 m/s (about 600 mph) wants to drop a package and hit a target 90 m below. When should the plane drop the package? a. Before the target c. Exactly over the target d. None of the above b. After the target 10. The five darts described below are all thrown from the same initial position. Which will hit the ground first? a. Dart A, with an initial vertical velocity of 20 m/s upward and an initial horizontal velocity of 0 m/s. b. Dart B, with an initial vertical velocity of 10 m/s upward and an initial horizontal velocity of 10 m/s. c. Dart C, with an initial vertical velocity of 15 m/s upward and an initial horizontal velocity of 0 m/s. d. Dart D, with an initial vertical velocity of 5 m/s upward and an initial horizontal velocity of 20 m/s.​

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1. The rolling ball that stops does not change in acceleration, as it moves at a constant velocity until it comes to a stop.

2. The correct answer is (a) I and II only. An object’s change in velocity is caused by changes in its acceleration, which can be an increase or decrease in speed or a change in direction.

3. The parabolic path followed by a projectile is (b) Trajectory.

4. The correct answer is (a) I and II only, as both a basketball and soccer ball follow a parabolic path when thrown or kicked.

5. The correct answer is (c) Both marbles will hit the ground at the same time, as they are both acted upon by the same acceleration due to gravity.

6. The correct answer is (d) II and III only, as projectile motion and rotational motion are both influenced solely by the acceleration due to gravity.

7. A projectile follows a (b) parabolic path when it is kicked from a height of 5 meters.

8. The correct answer is (c) It would land in the car, as both the ball and the car are moving forward at the same speed, and the ball would fall straight down from the perspective of someone in the car.

9. The correct answer is (c) Exactly over the target, as the horizontal distance traveled by the package will be equal to the distance traveled by the plane during the time it takes the package to fall.

10. The correct answer is (a) Dart A, as it has the highest initial vertical velocity and will therefore spend the least amount of time in the air before hitting the ground.

Explanation:

Here are explanations for each of the answers:

1. The rolling ball that stops does not change in acceleration because it moves at a constant velocity until it comes to a stop. Acceleration is the rate of change of velocity, and since the rolling ball’s velocity is constant, its acceleration is zero.

2. The correct answer is (a) I and II only because an object’s change in velocity is caused by changes in its acceleration, which can be an increase or decrease in speed or a change in direction. Falling from a high building (III) and being at rest (IV) do not cause a change in acceleration.

3. The parabolic path followed by a projectile is (b) trajectory. This is because a projectile is an object that is launched into the air and then moves under the influence of gravity, following a curved path known as its trajectory.

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4. The correct answer is (a) I and II only because a projectile is defined as an object that is launched into the air and then moves under the influence of gravity, following a parabolic path. Rain that falls from the clouds (III) and an electric fan that continues to rotate (IV) do not follow a parabolic path.

5. The correct answer is (c) Both marbles will hit the ground at the same time because they are both acted upon by the same acceleration due to gravity. The time it takes for an object to fall to the ground is independent of its horizontal velocity or angle of launch.

6. The correct answer is (d) II and III only because projectile motion and rotational motion are both influenced solely by the acceleration due to gravity. Linear motion (I) can be influenced by other forces as well.

7. A projectile follows a (b) parabolic path when it is kicked from a height of 5 meters. This is because a projectile is an object that is launched into the air and then moves under the influence of gravity, following a curved path known as its trajectory, which is parabolic in shape.

Sure, here are explanations for the remaining questions:

8. The correct answer is (c) It would land in the car because both the ball and the car are moving forward at the same speed, and the ball would fall straight down from the perspective of someone in the car. Neglecting air resistance, the ball would continue to move with the car until it falls straight down and lands in the car.

9. The correct answer is (c) Exactly over the target because the horizontal distance traveled by the package will be equal to the distance traveled by the plane during the time it takes the package to fall. This is because the plane and package are both moving forward at the same speed, so the package will fall straight down relative to the plane.

10. The correct answer is (a) Dart A because it has the highest initial vertical velocity and will therefore spend the least amount of time in the air before hitting the ground. The time it takes for an object to hit the ground depends only on its initial vertical velocity and the acceleration due to gravity, and not on its horizontal velocity. So, the dart with the highest initial vertical velocity will hit the ground first.

What if Money Were No Object?

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