Quiz-physics-Marija Glas

A projectile is launched horizontally from a high tower. Which one of the following graphs best represents the vertical component of the projectile’s velocity from the time it is launched to the time it hits the ground? Assume negligible air resistance.

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An astronaut drops an apple on the surface of the Moon where the acceleration due to gravity is of that 1/6 on Earth. The time it takes for the apple to fall to the grounds compared with an apple dropped from the same height on Earth is

• the same

• $\sqrt{6}$ times as long
  

• 6 times as long

• 36 times as long

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NGSS.HS-PS2-1

NGSS.HS-PS2-4

A cart is pulled along a horizontal track by a rope that passes over a fixed pulley, as shown in the figure. As the cart moves to the right, assume the tension in the rope and the frictional forces on the cart remain constant. As the cart moves to the right, its acceleration

• decreases.

• increases.

• remains constant.

• is zero.

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NGSS.HS-PS2-1

Two identical stones are dropped simultaneously from different heights. Air resistance is negligible. As the stones fall, the distance between them will

• increase continuously.

• decrease until they touch.

• remain the same.

• increase initially then remain the same.

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NGSS.HS-PS2-1

NGSS.HS-PS2-4

The graph shows the variation with time t of the velocity v of an object. Which one of the following graphs best represents the variation with time t of the acceleration a of the object?

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NGSS.HS-PS2-1

Peter and Susan both stand on the edge of a vertical cliff. Susan throws a stone vertically downwards and, at the same time, Peter throws a stone vertically upwards. The speed V with which both stones are thrown is the same. Neglecting air resistance, which one of the following statements is true?

• The stone thrown by Susan will hit the sea with a greater speed than the stone thrown by Peter.

• Both stones will hit the sea with the same speed no matter what the height of the cliff.

• In order to determine which stone hits the sea first, the height of the cliff must be known.

• In order to determine which stone hits the sea first both the height of the cliff and the mass of each stone must be known.

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NGSS.HS-PS2-1

NGSS.HS-PS2-4

A ball is dropped from rest at time t = 0 on to a horizontal surface from which it rebounds. Which one of the following graphs best shows the variation of speed v of the ball with time t from the time t = 0 to the time that the ball leaves the surface?

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NGSS.HS-PS2-1

A sailing boat is moving with constant velocity v to the right parallel to the dock. Sailor Hulot, up on the mast, drops his telescope at the moment he is opposite Lucie who is standing on the dock. Which one of the following best shows the path of the falling telescope as seen by Lucie?

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NGSS.HS-PS2-1

A ball, initially at rest, is dropped in the air from a great height. Air resistance is not negligible. Which of the following graphs best shows the variation with time t of the acceleration a of the ball?

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NGSS.HS-PS2-1

A ball is held at rest in air. The ball is then released. Which one of the following graphs best shows the variation with time t of the distance d fallen by the ball?

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Tags

NGSS.HS-PS2-1