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Question 19M.2.HL.TZ1.6b.i

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.2.HL.TZ1.6b.i
Level HL Paper 2 Time zone TZ1
Command term Calculate Question number b.i Adapted from N/A
b.i.
[Maximum mark: 1]
19M.2.HL.TZ1.6b.i

A small metal pendulum bob is suspended at rest from a fixed point with a length of thread of negligible mass. Air resistance is negligible.

The pendulum begins to oscillate. Assume that the motion of the system is simple harmonic, and in one vertical plane.

The graph shows the variation of kinetic energy of the pendulum bob with time.

When the 75 g bob is moving horizontally at 0.80 m s–1, it collides with a small stationary object also of mass 75 g. The object and the bob stick together.

(b.i)

Calculate the speed of the combined masses immediately after the collision.

[1]

Markscheme

0.40 «m s-1» ✔

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