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IES RAMÓN OLLEROS GREGORIO IRENE SANTOSFRAILE
CHEMISTRY & PHYSICS 2nd ESO 2019-2020
UNIT 7: MOTION AND SPPED
ACTIVITIES
1.- A girl leaves her house at 9,30 h to go to the sports centre and play a game of
basketball that starts an hour later.
a) Will she arrive on time if she walks at 30 m/min and the sports centre is 2 km
away from her house?
b) How quickly must she walk to reach the sports centre in 45 minutes?
2.- Which speed is greater than the other?.
a) 90 km/h or 24 m/s.
b) 36 km/h or 12 m/s.
c) 72 km/ or 18 m/s.
IES RAMÓN OLLEROS GREGORIO IRENE SANTOSFRAILE
CHEMISTRY & PHYSICS 2nd ESO 2019-2020
3.- Calculate the average speed of the following.
a) An athlete who runs 100 m in 10 s.
b) A lorry that travels 320 km in 4 hours.
5.- Train A leaves the station. Five minutes later, train B leaves the same station and
travels in the same direction as train A at the same speed. They both travel without
changing their speed along the same train track.
a) Will trains A and B ever meet?
b) Is train A in motion compared with the station?
c) Is train B in motion compared with train A?
d) Is the station in motion compared with train A?
6.- A moving object completes the first part of a trajectory with a constant speed of 25
km/h. It travels along the second part of the trajectory at aconstant speed of 435 m/min.
This object takes 3 min. to cover the first part and 5 min. to cover the second part.
a) What is the total distance covered?
b) What is the average speed?
7.- In Río de Janeiro 2016 Olympic Games, Usain Bolt run 100 m in 9,80 s and 200 m in
19,79 s.
a) What was the average speed in each race? Express the results in km/h.
b) Draw a s-t graph and compare both situations.
8.- A speed racing car leaves a state of rest and moves with uniformly accelerated
rectilinear motion. After 1 second it reaches a speed of 5 m/s.
a) What is the acceleration of the object?
b) How fast is it moving after 10 seconds? c) According to a v-t graph, how far has it
travelled after 10 seconds?
9.- A stone that is dropped from a tower takes 4 seconds to reach the ground. The
acceleration of free fall is g = 9,8 m/s2.
a) What will the stone’s speed be when it reaches the ground?
b) How tall is the tower?

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Unit 7 motion speed

  • 1. IES RAMÓN OLLEROS GREGORIO IRENE SANTOSFRAILE CHEMISTRY & PHYSICS 2nd ESO 2019-2020 UNIT 7: MOTION AND SPPED ACTIVITIES 1.- A girl leaves her house at 9,30 h to go to the sports centre and play a game of basketball that starts an hour later. a) Will she arrive on time if she walks at 30 m/min and the sports centre is 2 km away from her house? b) How quickly must she walk to reach the sports centre in 45 minutes? 2.- Which speed is greater than the other?. a) 90 km/h or 24 m/s. b) 36 km/h or 12 m/s. c) 72 km/ or 18 m/s.
  • 2. IES RAMÓN OLLEROS GREGORIO IRENE SANTOSFRAILE CHEMISTRY & PHYSICS 2nd ESO 2019-2020 3.- Calculate the average speed of the following. a) An athlete who runs 100 m in 10 s. b) A lorry that travels 320 km in 4 hours. 5.- Train A leaves the station. Five minutes later, train B leaves the same station and travels in the same direction as train A at the same speed. They both travel without changing their speed along the same train track. a) Will trains A and B ever meet? b) Is train A in motion compared with the station? c) Is train B in motion compared with train A? d) Is the station in motion compared with train A? 6.- A moving object completes the first part of a trajectory with a constant speed of 25 km/h. It travels along the second part of the trajectory at aconstant speed of 435 m/min. This object takes 3 min. to cover the first part and 5 min. to cover the second part. a) What is the total distance covered? b) What is the average speed? 7.- In Río de Janeiro 2016 Olympic Games, Usain Bolt run 100 m in 9,80 s and 200 m in 19,79 s. a) What was the average speed in each race? Express the results in km/h. b) Draw a s-t graph and compare both situations. 8.- A speed racing car leaves a state of rest and moves with uniformly accelerated rectilinear motion. After 1 second it reaches a speed of 5 m/s. a) What is the acceleration of the object? b) How fast is it moving after 10 seconds? c) According to a v-t graph, how far has it travelled after 10 seconds? 9.- A stone that is dropped from a tower takes 4 seconds to reach the ground. The acceleration of free fall is g = 9,8 m/s2. a) What will the stone’s speed be when it reaches the ground? b) How tall is the tower?