Atwood Machines Review

By collecting the appropriate data, the students can determine the relationship between the acceleration of the cart and the net force exerted on the cart. Which of the following graphs should the students produce to show the correct relationship?

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Tags

NGSS.HS-PS2-1

The students double the mass that hangs from the string. They also replace the original cart with a new cart that has double the mass. By doubling both masses, how will the tension in the string and the acceleration of the cart change?

• The tension and the acceleration will double.

• The tension will double, but the acceleration will stay the same.

• The tension will stay the same, but the acceleration will double.

• The tension and the acceleration will stay the same.

Tags

NGSS.HS-PS2-1

An Atwood’s machine is set up by suspending two blocks connected by a string of negligible mass over a pulley, as shown above. The blocks are initially held at rest and then released at time t =0 s. The speed of the 3 kg block at time t = 2.0 s is most nearly

• 2.0 m/s

• 4.0 m/s

• 7.0 m/s

• 10.0 m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

A 0.30 kg ball is in a cup of negligible mass attached to a block of mass M that is on a table. A string passing over a light pulley connects the block to a 2.5 kg object, as shown above. The system is released from rest, the block accelerates to the right, and after moving 0.95 m the block collides with a bumper near the end of the table. The ball continues to move and lands on the floor at a position 2.4 m below and 1.8 m horizontally from where it leaves the cup. Assume all friction is negligible.

Calculate the speed of the ball just after the block hits the bumper and the ball leaves the cup. (Hint: Find time using T-chart first.)

• 2.6 m/s

• 6.2 m/s

• 1.2 m/s

• 9.2 m/s

Tags

NGSS.HS-PS2-1

A 0.30 kg ball is in a cup of negligible mass attached to a block of mass M that is on a table. A string passing over a light pulley connects the block to a 2.5 kg object, as shown above. The system is released from rest, the block accelerates to the right, and after moving 0.95 m the block collides with a bumper near the end of the table. The ball continues to move and lands on the floor at a position 2.4 m below and 1.8 m horizontally from where it leaves the cup. Assume all friction is negligible.

Calculate the magnitude of the acceleration of the block as it moves across the table. (Hint: Use horizontal velocity to plug into the equation)

• 3.5 m/s²

• 5.3 m/s²

• 15.3 m/s²

• 13.35 m/s²

Tags

NGSS.HS-PS2-1

A 0.30 kg ball is in a cup of negligible mass attached to a block of mass M that is on a table. A string passing over a light pulley connects the block to a 2.5 kg object, as shown above. The system is released from rest, the block accelerates to the right, and after moving 0.95 m the block collides with a bumper near the end of the table. The ball continues to move and lands on the floor at a position 2.4 m below and 1.8 m horizontally from where it leaves the cup. Assume all friction is negligible.

(Calculate the mass M of the block.

• 4.24 kg

• 4.6 kg

• 8.64 kg

• 6.84 kg

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

A 0.30 kg ball is in a cup of negligible mass attached to a block of mass M that is on a table. A string passing over a light pulley connects the block to a 2.5 kg object, as shown above. The system is released from rest, the block accelerates to the right, and after moving 0.95 m the block collides with a bumper near the end of the table. The ball continues to move and lands on the floor at a position 2.4 m below and 1.8 m horizontally from where it leaves the cup. Assume all friction is negligible.

If the mass of the ball is increased, the horizontal distance it travels before hitting the floor will...

• decrease.

• increase.

• stay the same.

Tags

NGSS.HS-PS2-1