Lesson 6.02a-d
6.02a-d Work and mechanical energy Quiz: OCR Further Maths, Unit 3
20 questions
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Lesson 6.02a-d, Work and mechanical energy: 20 multiple choice questions for the OCR Further Maths (H245), Unit 3: Mechanics (Y543), written with Revision Ninja.
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The 20 questions
-
What is the SI unit used to measure work done and mechanical energy?
- Joule
- Watt
- Newton
- Pascal
-
Which formula gives the kinetic energy of a body of mass m moving at speed v?
- m v
- 0.5 m v^2
- m g h
- 0.5 m v
-
Which formula gives elastic potential energy stored in a spring with modulus lambda?
- lambda x^2 / l
- lambda x / l
- lambda x / 2l
- lambda x^2 / 2l
-
What are the base SI dimensions of work done in terms of M, L, and T?
- M L^2 T^-2
- M L T^-1
- M L T^-2
- M L^2 T^-1
-
How much work is done by a force acting perpendicular to the direction of motion?
- Maximum work
- Negative work
- Zero
- Force times distance
-
What name is given to forces where work done is independent of path taken?
- Non-conservative forces
- Dissipative forces
- Frictional forces
- Conservative forces
-
What mathematical operation calculates the work done by a variable force along a line?
- Multiplication
- Differentiation
- Vector product
- Integration
-
What term describes the rate at which mechanical work is done with respect to time?
- Energy
- Momentum
- Impulse
- Power
-
What is the work done when a constant force of 10 N moves an object 4 m?
- 20 J
- 14 J
- 40 J
- 2.5 J
-
What elastic potential energy is stored in a spring with stiffness 50 N/m extended by 0.2 m?
- 0.2 J
- 5 J
- 1 J
- 10 J
-
What GPE is lost when a 2 kg mass drops 5 m vertically under gravity g = 9.8 m/s^2?
- 49 J
- 98 J
- 10 J
- 19.6 J
-
What is the kinetic energy of a 4 kg mass travelling at a constant speed of 3 m/s?
- 36 J
- 18 J
- 12 J
- 6 J
-
What work is done by force vector (3i + 4j) N acting over displacement (2i - j) m?
- 10 J
- 14 J
- 2 N
- 2 J
-
What power is developed by a force of 20 N moving an object at 5 m/s?
- 500 W
- 25 W
- 4 W
- 100 W
-
What factor does kinetic energy increase by if the velocity of an object is doubled?
- 8
- 2
- 4
- 16
-
How much work is done against friction when moving 3 m against a 5 N force?
- 30 J
- 15 J
- 1.67 J
- 8 J
-
What work is done by a force F = 3x^2 N moving an object from x = 0 to 2 m?
- 8 J
- 12 J
- 24 J
- 4 J
-
What EPE is stored in a string with modulus 40 N, natural length 1 m, extended by 0.5 m?
- 2.5 J
- 20 J
- 5 J
- 10 J
-
What work is done by the resultant force accelerating a 1000 kg car from rest to 20 m/s?
- 100 kJ
- 200 kJ
- 400 kJ
- 20 kJ
-
How many seconds does a 600 W engine take to perform 3 kJ of mechanical work?
- 0.2 s
- 5 s
- 50 s
- 18 s
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