MCQ

Power

A force of 1000 N is needed to lift the hook of a crane at a steady velocity. The crane is then used to lift a load of mass 1000 kg at a velocity of 0...

2010 Summer

3

MCQ

Power

What are units of work, energy and power?

2010 Winter

3

MCQ

Power

A force of 1000 N is needed to lift the hook of a crane at a steady velocity. The crane is then used to lift a load of mass 1000 kg at a velocity of 0...

2010 Summer

2

MCQ

Power

A steam turbine is used to drive a generator. The input power to the turbine is $P_I$ and the output power $P_O$. The power loss in the turbine is $P_...

2010 Winter

2

MCQ

Power

The diagram shows a lift system in which the elevator (mass $m_1$) is partly counterbalanced by a heavy weight (mass $m_2$). At what rate does the mo...

2010 Winter

3

Theory

Power

(a) Distinguish between gravitational potential energy and electric potential energy. [2] (b) A body of mass $m$ moves vertically through a dist...

2011 Winter

3

MCQ

Power

The force resisting the motion of a car is taken as being proportional to the square of the car’s speed. The magnitude of the force at a speed o...

2012 Summer

3

MCQ

Power

A car engine exerts an average force of 500 N in moving the car 1.0 km in 200 s. What is the average power developed by the engine?

2012 Summer

2

MCQ

Power

An electrical generator is started at time zero. The total electrical energy generated during the first 5 seconds is shown in the graph. What is th...

2013 Winter

3

MCQ

Power

A turbine at a hydroelectric power station is situated 30 m below the level of the surface of a large lake. The water passes through the turbine at a ...

2013 Winter

3

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

When a force $F$ moves its point of application through a displacement $s$ in the direction of the force, the work $W$ done by the force is given by $...

2012 Summer

3

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

What is a possible unit for the product $VI$, where $V$ is the potential difference across a resistor and $I$ is the current through the same resistor...

2012 Summer

2

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

What is a reasonable estimate of the average kinetic energy of an athlete during a 100 m race that takes 10 s?

2012 Summer

3

MCQ

CH2 - MEASUREMENT TECHNIQUES

A light-meter measures the intensity $I$ of the light falling on it. Theory suggests that $I$ varies inversely as the square of the distance $d$. W...

2012 Summer

3

MCQ

CH2 - MEASUREMENT TECHNIQUES

In an experiment, a radio-controlled car takes $2.50 \pm 0.05$ s to travel $40.0 \pm 0.1$ m. What is the car’s average speed and the uncertaint...

2012 Summer

2

MCQ

CH3 - KINEMATICS

In an experiment to determine the acceleration of free fall using a falling body, what would lead to a value that is too large?

2012 Summer

3

MCQ

CH3 - KINEMATICS

Which feature of a graph allows acceleration to be determined?

2012 Summer

3

MCQ

CH3 - KINEMATICS

The diagram shows a laboratory experiment in which a feather falls from rest in a long evacuated vertical tube of length $L$. The feather takes tim...

2012 Summer

3

MCQ

CH3 - KINEMATICS

In the absence of air resistance, a stone is thrown from P and follows a parabolic path in which the highest point reached is T. The stone reaches poi...

2012 Summer

3

MCQ

CH5 - FORCES, DENSITY & PRESSURE

Each option gives a correct word equation involving force. Which option gives the definition of force?

2012 Summer

3