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A projectile is launched with an initial speed v at a launch angle of 30° above the ground. It lands on the ground 2 s later. How does the maximum height of the projectile change as the launch angle is increased from 30° to 45° above the horizontal?
increasing the height to 2h
the same
Both spheres hit the ground at the same time, but sphere A lands twice as far as sphere B from the base of the tower.
The projectile's maximum height will increase
0.0 m/s
less than 38 m horizontally and less than 6.7 m vertically
45°
The block and the ball hit the ground at the same time because they have the same vertical acceleration.
A 2-kilogram block is dropped from the roof of a tall building at the same time a 6-kilogram ball is thrown horizontally from the same height. Which statement best describes the motion of the block and the motion of the ball? (Neglect air friction.)
increasing the height to 2h
the same
Both spheres hit the ground at the same time, but sphere A lands twice as far as sphere B from the base of the tower.
The projectile's maximum height will increase
0.0 m/s
less than 38 m horizontally and less than 6.7 m vertically
45°
The block and the ball hit the ground at the same time because they have the same vertical acceleration.
Two spheres are simultaneously projected horizontally from the top of a tower. Sphere A has a horizontal speed of 40 m/s and sphere B has a horizontal speed of 20 m/s. Which statement best describes the landing time and range? (Neglect friction.)
increasing the height to 2h
the same
Both spheres hit the ground at the same time, but sphere A lands twice as far as sphere B from the base of the tower.
The projectile's maximum height will increase
0.0 m/s
less than 38 m horizontally and less than 6.7 m vertically
45°
The block and the ball hit the ground at the same time because they have the same vertical acceleration.
A soccer ball is kicked into the air with an initial speed of 20 m/s and returns to ground level. At which angle above the horizontal should it be kicked in order for it to travel the greatest range? (Neglect friction.)
increasing the height to 2h
the same
Both spheres hit the ground at the same time, but sphere A lands twice as far as sphere B from the base of the tower.
The projectile's maximum height will increase
0.0 m/s
less than 38 m horizontally and less than 6.7 m vertically
45°
The block and the ball hit the ground at the same time because they have the same vertical acceleration.
A projectile with mass m is fired with initial horizontal velocity v from height h above level ground. Which change would have resulted in a greater time of flight for the projectile? Neglect friction.
increasing the height to 2h
the same
Both spheres hit the ground at the same time, but sphere A lands twice as far as sphere B from the base of the tower.
The projectile's maximum height will increase
0.0 m/s
less than 38 m horizontally and less than 6.7 m vertically
45°
The block and the ball hit the ground at the same time because they have the same vertical acceleration.
A ball thrown vertically upward reaches a maximum height of 30. meters above the surface of Earth. At its maximum height, the speed of the ball is
increasing the height to 2h
the same
Both spheres hit the ground at the same time, but sphere A lands twice as far as sphere B from the base of the tower.
The projectile's maximum height will increase
0.0 m/s
less than 38 m horizontally and less than 6.7 m vertically
45°
The block and the ball hit the ground at the same time because they have the same vertical acceleration.
Without air resistance, a kicked ball would reach a maximum height of 6.7 meters and land 38 meters away. With air resistance, the ball would travel
increasing the height to 2h
the same
Both spheres hit the ground at the same time, but sphere A lands twice as far as sphere B from the base of the tower.
The projectile's maximum height will increase
0.0 m/s
less than 38 m horizontally and less than 6.7 m vertically
45°
The block and the ball hit the ground at the same time because they have the same vertical acceleration.
Two stones, A and B, are thrown horizontally from the top of a cliff. Stone A has an initial speed of 15 m/s and stone B has an initial speed of 30 m/s. Compared to the time it takes stone A to land, the time it takes stone B to land is
increasing the height to 2h
the same
Both spheres hit the ground at the same time, but sphere A lands twice as far as sphere B from the base of the tower.
The projectile's maximum height will increase
0.0 m/s
less than 38 m horizontally and less than 6.7 m vertically
45°
The block and the ball hit the ground at the same time because they have the same vertical acceleration.
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