TuitionGoWhere Practice Paper - Physics H1 A-Level
TuitionGoWhere Practice Paper (AI)
Subject: Physics H1 (8867)
Level: A-Level
Paper: Practice Paper 2 (Structured Questions)
Version: 5 of 5
Duration: 2 hours
Total Marks: 80
Name: __________________________
Class: __________________________
Date: __________________________
Instructions to Candidates
- Write your name, class, and date in the spaces provided.
- Answer all questions.
- Write your answers in the spaces provided in this question paper.
- You may lose marks if you do not show your working or if you do not use appropriate units.
- The number of marks is given in brackets [ ] at the end of each question or part question.
- Assume acceleration due to gravity g=9.81 m s−2 unless otherwise stated.
Section A
Answer all questions in this section. This section focuses on Kinematics, Dynamics, and Forces.
1. A drone is used to deliver a package. It starts from rest and accelerates uniformly upwards.
(a) Define acceleration. [1]
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(b) The drone reaches a vertical velocity of $12.0 \text{ m s}^{-1}$ in $4.0 \text{ s}$. Calculate the vertical displacement of the drone during this time. [2]
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(c) Sketch a velocity-time graph for this motion from $t=0$ to $t=4.0 \text{ s}$. Label the axes with appropriate values. [2]
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2. A car of mass 1200 kg travels along a straight horizontal road. The engine provides a driving force of 3000 N. The total resistive force acting on the car is constant at 600 N.
(a) Calculate the acceleration of the car. [2]
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(b) The car travels for $10 \text{ s}$ from rest. Calculate the distance travelled in this time. [2]
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(c) Explain, in terms of forces, why the car eventually reaches a constant maximum speed (terminal velocity) if the driving force remains constant but air resistance increases with speed. [2]
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3. A uniform beam AB of length 4.0 m and weight 200 N is hinged at end A to a vertical wall. The beam is held horizontal by a cable attached to end B and to the wall at a point 3.0 m vertically above A.
(a) Draw a free-body diagram for the beam, showing all forces acting on it. Label the forces clearly. [3]
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(b) Calculate the tension in the cable. [3]
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4. State the principle of conservation of linear momentum. [2]
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5. Two ice skaters, Skater X (mass 50 kg) and Skater Y (mass 70 kg), are initially at rest on frictionless ice. They push against each other and move apart. Skater X moves with a velocity of 2.1 m s−1 to the left.
(a) Calculate the velocity of Skater Y. [3]
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(b) Determine whether the collision (push) is elastic or inelastic. Show your working by comparing the total kinetic energy before and after the push. [3]
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Section B
Answer all questions in this section. This section focuses on Work, Energy, and Power.
6. A crane lifts a load of mass 500 kg vertically upwards at a constant speed of 0.5 m s−1.
(a) Calculate the power output of the crane motor. [3]
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(b) The crane motor has an efficiency of $80\%$. Calculate the electrical power input required. [2]
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7. A ball of mass 0.2 kg is dropped from a height of 5.0 m onto a hard surface. It rebounds to a height of 3.2 m.
(a) Calculate the speed of the ball just before it hits the ground. [2]
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(b) Calculate the speed of the ball just after it leaves the ground. [2]
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(c) Calculate the loss in kinetic energy during the impact with the ground. [3]
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8. A block of mass 2.0 kg slides down a rough inclined plane. The plane is inclined at 30∘ to the horizontal. The block starts from rest and travels 5.0 m down the slope, reaching a speed of 4.0 m s−1.
(a) Calculate the loss in gravitational potential energy. [2]
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(b) Calculate the gain in kinetic energy. [2]
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(c) Determine the average frictional force acting on the block. [3]
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9. Define work done by a force. [1]
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10. A car engine exerts a constant driving force of 800 N to move the car at a constant speed of 25 m s−1 along a horizontal road.
(a) Calculate the work done by the driving force in 10 s. [2]
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(b) State the magnitude of the resistive forces acting on the car. [1]
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Section C
Answer all questions in this section. This section focuses on Momentum, Impulse, and Complex Mechanics Applications.
11. A tennis ball of mass 0.06 kg is moving horizontally towards a racket at 20 m s−1. It is struck by the racket and leaves horizontally in the opposite direction at 30 m s−1. The contact time is 0.01 s.
(a) Calculate the change in momentum of the ball. [3]
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(b) Calculate the average force exerted by the racket on the ball. [2]
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12. Explain why airbags in cars reduce the risk of injury to passengers during a collision, referring to the concepts of impulse and force. [3]
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13. A rocket of mass 1000 kg (including fuel) is stationary on a launch pad. It ejects gas downwards at a speed of 2000 m s−1 relative to the rocket. The rate of mass ejection is 5.0 kg s−1.
(a) Calculate the thrust force produced by the rocket engine. [2]
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(b) Determine if the rocket will lift off immediately. Justify your answer with a calculation of the weight. [3]
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14. A student investigates the relationship between the extension of a spring and the load applied. The spring obeys Hooke's Law.
(a) State Hooke's Law. [1]
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(b) The spring constant is $50 \text{ N m}^{-1}$. Calculate the elastic potential energy stored in the spring when it is extended by $0.2 \text{ m}$. [2]
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15. A projectile is launched from ground level with an initial velocity of 20 m s−1 at an angle of 45∘ to the horizontal. Air resistance is negligible.
(a) Calculate the horizontal component of the initial velocity. [1]
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(b) Calculate the time taken to reach the maximum height. [2]
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(c) Calculate the horizontal range of the projectile. [2]
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16. Two trolleys, A and B, move on a frictionless track. Trolley A (mass 1.0 kg) moves at 2.0 m s−1 towards stationary Trolley B (mass 2.0 kg). They collide and stick together.
(a) Calculate the common velocity after the collision. [3]
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(b) Calculate the fraction of the initial kinetic energy that is lost in the collision. [3]
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17. A lift (elevator) of mass 800 kg carries passengers of total mass 200 kg. The lift accelerates upwards at 1.5 m s−2.
(a) Calculate the tension in the cable supporting the lift. [3]
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(b) The lift then moves upwards at a constant speed. State how the tension in the cable compares to the weight of the lift and passengers. [1]
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18. A ball is thrown vertically upwards.
(a) Describe the energy changes that occur from the moment the ball leaves the hand until it reaches its maximum height. [2]
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(b) At the maximum height, state the value of the ball's kinetic energy. [1]
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19. A car of mass 1000 kg travels around a circular bend of radius 50 m at a constant speed of 15 m s−1.
(a) Calculate the centripetal acceleration of the car. [2]
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(b) Calculate the centripetal force required to keep the car on the circular path. [2]
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(c) Identify the force that provides this centripetal force. [1]
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20. A force F varies with distance d as shown in the graph below (description: linear increase from 0 N at 0 m to 10 N at 5 m).
(a) Calculate the work done by the force over the distance of 5 m. [2]
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(b) If this work is done on a $2.0 \text{ kg}$ object initially at rest, calculate its final speed. [3]
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End of Paper