1. Two stones, A and B, are thrown horizontally from the top of a cliff. Stone A has an initial speed of 15 meters per second and stone B has an initial speed of 30. meters per second. Compared to the time it takes stone A to reach the ground, the time it takes stone B to reach the ground is A)) the same B) twice as great C) half as great D) four times as great . which graph best represents the relationship between the acceleration of an object falling freely near the surface of Earth and the time that it falls? A) B) Time Time Time Time 6. A child, starting from rest at the top of a playground slide, reaches a speed of 7.0 meters per second at the bottom of the slide. What is the vertical height of the slide? [Neglect friction.] 3. An object is dropped from rest and falls freely 20. meters to Earth. When is the speed of the object 9.8 meters per second? A) during the entire first second of its fall B) at the end of its first second of fall T) during its entire time of fall B) 1.4 m A) 0.71 m C) 2.5 m 7. A ball is thrown vertically upward with an initial velocity of 29.4 meters per second. What is the maximum height reached by the ball? [Neglect friction.] D) 3.5 m D) after it has fallen 9.8 meters 4. A 4.0-kilogram rock and a 1.0-kilogram stone fall freely from rest from a height of 100 meters. After they fall for 2.0 seconds, the ratio of the rock's speed to the stone's speed is A) 14.7 m ©)44.1 m B) 29.4 m D) 88.1 m (A) 1:1 В) 1:2 C) 2:1 D) 4:1 5. Objects A and B are dropped from rest near Earth's surface. Object A has mass m and object B has mass 2m. After 2 seconds of free fall, object A has a speed v and has fallen a distance d. What are the speed and distance of fall of object B after 2 seconds of free fall? 8. A book of mass m falls freely from rest to the floor from the top of a desk of height h. What is the speed of the book upon striking the floor? A 2gh B) 2gh C) mgh D) mh A) speed v/2; distance = d/2 B) speed = v; distance = d C) speed = v/2; distance = 2d D) speed = 2v; distance = 2d 9. A baseball dropped from the roof of a tall building takes 3.1 seconds to hit the ground. How tall is the building? [Neglect friction.] A) 15 m B) 30. m C)) 47 m D) 94 m - 15- Acceleration Acceleration Acceleration

1. Two stones, A and B, are thrown horizontally from the top of a cliff. Stone A has an initial speed of 15 meters per second and stone B has an initial speed of 30. meters per second. Compared to the time it takes stone A to reach the ground, the time it takes stone B to reach the ground is A)) the same B) twice as great C) half as great D) four times as great . which graph best represents the relationship between the acceleration of an object falling freely near the surface of Earth and the time that it falls? A) B) Time Time Time Time 6. A child, starting from rest at the top of a playground slide, reaches a speed of 7.0 meters per second at the bottom of the slide. What is the vertical height of the slide? [Neglect friction.] 3. An object is dropped from rest and falls freely 20. meters to Earth. When is the speed of the object 9.8 meters per second? A) during the entire first second of its fall B) at the end of its first second of fall T) during its entire time of fall B) 1.4 m A) 0.71 m C) 2.5 m 7. A ball is thrown vertically upward with an initial velocity of 29.4 meters per second. What is the maximum height reached by the ball? [Neglect friction.] D) 3.5 m D) after it has fallen 9.8 meters 4. A 4.0-kilogram rock and a 1.0-kilogram stone fall freely from rest from a height of 100 meters. After they fall for 2.0 seconds, the ratio of the rock's speed to the stone's speed is A) 14.7 m ©)44.1 m B) 29.4 m D) 88.1 m (A) 1:1 В) 1:2 C) 2:1 D) 4:1 5. Objects A and B are dropped from rest near Earth's surface. Object A has mass m and object B has mass 2m. After 2 seconds of free fall, object A has a speed v and has fallen a distance d. What are the speed and distance of fall of object B after 2 seconds of free fall? 8. A book of mass m falls freely from rest to the floor from the top of a desk of height h. What is the speed of the book upon striking the floor? A 2gh B) 2gh C) mgh D) mh A) speed v/2; distance = d/2 B) speed = v; distance = d C) speed = v/2; distance = 2d D) speed = 2v; distance = 2d 9. A baseball dropped from the roof of a tall building takes 3.1 seconds to hit the ground. How tall is the building? [Neglect friction.] A) 15 m B) 30. m C)) 47 m D) 94 m - 15- Acceleration Acceleration Acceleration

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Uploaded: 2024-03-05T11:56:34.000Z
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