preparing to summative assessment Term 1, Grade 11

Which combination of units could be used for expressing the power dissipated in a resistor?

• newton per second

• newton second

• newton metre

• newton metre per second

A micrometer screw gauge is used to measure the diameter of a wire. The reading on the micrometer with the jaws closed is (–0.05 +,- 0.02) mm. The reading with the wire in position between the two jaws is (+1.03 +,- 0.02) mm. What is the diameter of the wire?

• (0.98 +,- 0.02) mm

• (1.08 +,- 0.02) mm

• (0.98 +,-0.04) mm

• (1.08+,- 0.04) mm

A projectile is launched at an angle to the horizontal at time t = 0. It travels over horizontal ground, as shown.

Air resistance is negligible. Which graph best shows the variation with t of the speed of the projectile from when it is launched to when it lands on the ground?

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The graph shows how quantity P varies with quantity Q for a body falling vertically downwards in a uniform gravitational field with air resistance.

• P-acceleration

  Q-force of air resistance

• P-acceleration

  Q- time

• P-velocity

  Q-force of air resistance

• P-velocity

  Q-time

Vectors which lie on the same plane, in a three-dimensional space called ...

Water of depth 9.0 cm is covered by oil of depth 5.0 cm in a measuring cylinder. The density of the water is 1000 kg m^–3 and the density of the oil is 800 kgm^–3. What is the total pressure exerted on the base of the measuring cylinder due to the oil and water?

• 390Pa

• 880Pa

• 1200Pa

• 1300Pa

Define density: mass/ ........

Which expression has the same SI base units as pressure?

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The speed v of a liquid leaving a tube depends on the change in pressure 'P and the density ρ of the liquid. The speed is given by the equation (Figure is given) where k is a constant that has no units. What is the value of n?

• 1 /2

• 1

• 3/2

• 2

Which row correctly describes the quantities momentum, power and temperature?

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