Review Topic 2.1- Motion

Samantha walks along a horizontal path in the direction shown. The curved part of the path is a semi-circle. The magnitude of her displacement from point P to point Q is approximately

• 2 m

• 4m

• 6 m

• 8 m

Joseph runs along a long straight track. The variation of his speed v with time t is shown below. After 25 seconds Joseph has run 200 m. Which of the following is correct at 25 seconds?

• Instantaneous speed / m s^–1 = 8, Average speed / m s^–1 = 8

• Instantaneous speed / m s^–1 = 8, Average speed / m s^–1 = 10

• Instantaneous speed / m s^–1 = 10, Average speed / m s^–1 = 8

• Instantaneous speed / m s^–1 = 10, Average speed / m s^–1 = 10

Which of the following quantities can be determined from a speed-time graph of a particle travelling in a straight line?

• Only the magnitude of the acceleration at a given instant

• Both the velocity and the acceleration at a given instant

• Only the distance travelled in a given time

• Both the distance travelled in a given time and the magnitude of the acceleration at a given instant

A ball is thrown vertically upwards from the ground. The graph shows the variation with time t of the vertical displacement d of the ball. Which of the following gives the final displacement after time T and the average speed between time t = 0 and time t = T?

• displacement: 0, avarage speed: 0

• displacement: 0, avarage speed: 2D/T

• displacement: 2D, avarage speed: 2D/T

• displacement: 2D, avarage speed: 0

The graph below shows the variation with time t of the velocity v of an object moving on a straight-line. Which of the graphs below best represents the variation with time t of the acceleration a of the object?

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A stone is thrown from a cliff and it lands in the sea as shown below. Air resistance is negligible. Which of the following statements is correct whilst the stone is in motion?

• The vertical component of the stone’s displacement is constant.

• The horizontal component of the stone’s displacement is constant.

• The vertical component of the stone’s velocity is constant.

• The horizontal component of the stone’s velocity is constant.

The diagram shows the path of a projectile that is launched with velocity v. Air resistance is negligible. A second projectile has double the mass of the first projectile and is launched with the same velocity. Air resistance is still negligible. Which of the following paths best represents the path of the projectile? (The original path is shown as a dotted line)

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An object moves in the x-y plane. The graphs below show how the component of its velocity Vx in the x-direction and the component of its velocity Vy in the y-direction, vary with time t. The particle is moving

• in a parabola.

• with simple harmonic motion.

• with constant velocity in a straight line.

• in a circle

A stone is thrown horizontally from the top of a cliff with an initial speed v. The time of flight of the stone is t and its range R. Air resistance is negligible. For a stone that is thrown horizontally from the top of the cliff with an initial speed 3v, which of the following is correct?

• Time of flight: t, Range: R

• Time of flight: 3t, Range: 3R

• Time of flight: t, Range: 3R

• Time of flight: 3t, Range: R

A raindrop falling from rest at time t = 0 reaches terminal velocity. Which graph best represents how the speed v varies with time t?

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