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SITEMAP School Physics revision notes: (e) Kinetic energy stores and calculations
UK GCSE level age ~1416 ~US grades 910 Scroll down, take time to study content or follow links
TYPES OF ENERGY STORE  examples explained (e) Kinetic energy stores (KE) and calculations Doc Brown's Physics Exam Revision Notes: This page will help you with ... How solve numerical problems involving kinetic energy, how to explain examples of KE, how to use the formula and do calculations problem solving using the formula for kinetic energy Index of types of energy stores/transfers This page contains online questions only. Jot down your answers and check them against the worked out ANSWERS at the end of the page Kinetic energy or movement energy (KE) and kinetic energy stores
See also Reaction times, stopping distances, safety aspects. calculations involving kinetic energy For more on efficiency see Energy transfersconversions, efficiency  calculations ANSWERS to the kinetic energy store problems Q1 A swimmer of mass 70 kg is moving at a speed of 1.4 m/s.
Q2 A bullet with a mass of 10.0 g is travelling with an initial speed of 400 m/s.
Q3 A car of mass 1200 kg is travelling at a steady speed of 30.0 m/s (~67 mph, 108 km/hour).
Q4 The chemical potential energy store of a 100 g rocket, on firing, gives it an initial kinetic energy store of 200 J.
Q5 A projectile is required to impart a kinetic energy blow of 5000 J at a speed of 500 m/s.
Q6. A pole vaulter has a weight of 800 N and vaults to a height of 4.5 m.
Q7 A diver of mass 60 kg is perched on a 7.5 m high diving board. (First see GPE calculations page)
Q8 A small bee of mass 0.06 g leaps up 10 cm above a flower. (g = 10 N/kg)
Q9 In falling, an initially stationary 2.00 kg weight, loses 500 J of energy before hitting the floor.
Q10 An electric motor in a toy train does 0.2 J of work to accelerate it to a speed of 25 cm/s.
Keywords, phrases and learning objectives on kinetic energy stores
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See also Reaction times, stopping distances, safety aspects. calculations involving kinetic energy For more on efficiency see Energy transfersconversions, efficiency  calculations Kinetic energy store problems Q1 A swimmer of mass 70 kg is moving at a speed of 1.4 m/s.
Q2 A bullet with a mass of 10.0 g is travelling with an initial speed of 400 m/s.
Q3 A car of mass 1200 kg is travelling at a steady speed of 30.0 m/s (~67 mph, 108 km/hour).
Q4 The chemical potential energy store of a 100 g rocket, on firing, gives it an initial kinetic energy store of 200 J.
Q5 A projectile is required to impart a kinetic energy blow of 5000 J at a speed of 500 m/s.
Q6. A pole vaulter has a weight of 800 N and vaults to a height of 4.5 m. (See gravitational potential energy calculation page)
Q7 A diver of mass 60 kg is perched on a 7.5 m high diving board. (First see GPE calculations page)
Q8 A small bee of mass 0.06 g leaps up 10 cm above a flower. (g = 10 N/kg)
Q9 In falling, an initially stationary 2.00 kg weight, loses 500 J of energy before hitting the floor.
Q10 An electric motor in a toy train does 0.2 J of work to accelerate it to a speed of 25 cm/s.

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