Energy, forces, work and power
Science KS4: Lesson 3
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Science KS4 Lesson 3: Energy, forces, work and power
Screen 2a: This crane is lifting a skip of material from the base of the shaft to the surface. What energy changes take place during the skip’s journey?
Screen 2b: This crane is lifting a skip of material from the base of the shaft to the surface. What energy changes take place during the skip’s journey?
Screen 3a: While the skip is stationery in the air, what forces act on it? What can you say about these forces? When the crane has lifted the skip from the base to the surface, what work has been done?
Screen 3b: While the skip is stationery in the air, what forces act on it? What can you say about these forces? When the crane has lifted the skip from the base to the surface, what work has been done?
Screen 4a: Work and energy are both measured in joules. Power is the energy used or created per second, measured in watts. How can you calculate the power of the crane?
Screen 4b: Work and energy are both measured in joules. Power is the energy used or created per second, measured in watts. How can you calculate the power of the crane?
Screen 5: Worksheet answers
Screen 6: Worksheet answers
Screen 7: Worksheet answers