Name: __________ Number: ____
Class: ______
Exercises: Uniform linear motions (ULM / URM)
1. A pedestrian is walking at a constant speed of 1.1 m / s for 2 minutes and 40 seconds.
Calculate the distance.
2. The distance between Bangkok and Chon Buri on the Motorway is 90 km. Calculate the
average speed, in km/h, of a car leaving from Bangkok at 15:30 and arriving to Chon Buri
at 16:45. Express the velocity in m/s.
3. At the temperature of 15 °C, the sound propagates through the air at the speed of 340
m/s. Calculate the time needed to cover 1000 m.
4. A man is walking (URM) at a speed of 1.25 m / s for 12 minutes. He then stops for 3
minutes. He leaves and travels 630 meters at the speed of 1.05 m / s. Calculate the
average speed for the entire described displacement.
5. Moving a moving body is described in Figure 1.16. The path is rectilinear.
6. Determining for each phase if there is a URM, a stop or movement non-uniform.
7. Determine the speed of mobile in phases B and D.
8. For the whole movement described in Figure 1.16, calculate the average speed of the
mobile.
Name: __________ Number: ____
Class: ______
9. Figure 1.17 below describes the movement of a pedestrian. Plot the graph of velocity
versus time corresponding to the movement of the pedestrian.
10. For 3.0 s, a model self remote moves at constant speed of 0.60 m / s. It is then switched
off during 2.0 s. Then, it is delivered at the speed of 0.40 m / s in 5.0 s.
a. Building the velocity-time graph.
b. Building the position-time graph
11. A motorcycle takes one hour to go from Khon Kaen to Udon Thani (120 km). Calculate its
average speed in km/h and m/s.
12. Two vehicles are moving in the same direction on the motorway from Bangkok to
Pattaya (150km). The police car is leaving Bangkok at a speed of 140 km/h. The truck is
already 30 km away and at a speed of 90 km/h.
a) How long will it take for the police car to catch the
truck.
b) Will the police car be able to catch the truck before
it arrives to Pattaya?
Name: __________ Number: ____
Class: ______
18. Two trains leave the train station at the same time (08:00 AM). The first one leaves from
Bangkok and the other from Chiang Mai. The distance separating
Bangkok and Chiang Mai is 700 km. If the train from Bangkok has a
speed of 60 km/h and the train from Chiang Mai has a speed of 50
km/h, how far from Bangkok should they cross each other and at
what time ?