Respiration Aerobic and Anaerobic_Unsolved Paper
Chapter: Life Processes | Topic: Respiration Aerobic and Anaerobic
RESPIRATION AEROBIC AND ANAEROBIC_UNSOLVED PAPER
Topic: Respiration Aerobic and Anaerobic
Q1. A Free Body Diagram represents:
- Internal forces only
- External forces acting on an isolated object
- The surroundings of the object
- The motion path of the object
Q2. Which force acts vertically downward on every object near the Earth's surface?
- Friction
- Tension
- Weight
- Normal reaction
Q3. A book placed on a table experiences an upward force called:
- Tension
- Magnetic force
- Normal reaction
- Electrostatic force
Q4. A child pulls a toy cart with a string. Which force acts through the string?
- Friction
- Tension
- Weight
- Buoyant force
Q5. A bicycle slows down after pedalling stops mainly because of:
- Friction
- Weight
- Tension
- Magnetic force
Q6. If the net external force acting on an object is zero, the forces are said to be:
- Unbalanced
- Balanced
- Circular
- Variable
Short questions
Q1. Define a Free Body Diagram. Why is it useful in solving problems related to motion?
Q2. Draw and label the Free Body Diagram of a book resting on a horizontal table.
Q3. Differentiate between balanced and unbalanced forces with the help of Free Body Diagrams.
Q4. A student pushes a classroom desk across the floor. Identify all the external forces acting on the desk.
Q5. Why should an object be isolated from its surroundings before drawing a Free Body Diagram?
Q6. Draw the Free Body Diagram of a ball hanging freely from a rope.
Q1. Explain the step-by-step procedure for drawing a correct Free Body Diagram with a suitable example.
Q2. Compare the Free Body Diagrams of:
a stationary object on a table,
an object moving on a rough horizontal surface.
Explain the forces acting in both situations.
Q3. During a school science exhibition, students pull a trolley carrying equipment. Draw and explain the Free Body Diagram of the trolley and discuss the role of each force acting on it.
application-based questions
Q1. A block of mass 6 kg is placed on a horizontal surface.
Draw its Free Body Diagram and calculate its weight.
(Take (g = 9.8,m/s^2).)
Q2. A 15 kg wooden box is pushed with a horizontal force of 90 N. A frictional force of 30 N opposes its motion.
Draw the Free Body Diagram and determine the net horizontal force acting on the box.
Q3. A ceiling fan of mass 4 kg hangs from the ceiling by a strong rod.
Draw its Free Body Diagram and calculate:
The weight of the fan.
The supporting force acting on the fan when it is at rest.
(Take (g = 9.8,m/s^2).)