Ulangan Harian Gerak Lurus
Soal:
1. The diagram below shows velocity-time graph of a moving object. What is the displacement experienced by the object?
a. 47
b. 35
c. 23
d. 20
e. 12
2. From the velocity-time graph below, the average velocity of the object moving is … m/s.
a. 0
b. 6
c. 8
d. 72
e. 96
3. Two cars at a distance of 50 km apart. Car A is moving with the velocity of 40 km/h towards car B and car B is moving with the velocity of 60 km/h towards car A at a certain time. Both cars will meet when A has travelled the distance of … km.
a. 10
b. 20
c. 25
d. 35
e. 40
4. Kevin is driving his car with the speed of 10 m/s when he sees an obstacle 30 m in front of him. Kevin needs 1 s before he hits the brake pedal so that the car decelerate with constant deceleration of 2 m/s2.
a. Kevin can stop just before he hits the obstacle
b. Kevin can stop 5 m before he hits the obstacle
c. Kevin hits the obstacle
d. Kevin can stop 10 m after he hits the obstacle
e. Kevin can stop 10 m before he hits the obstacle
5. The motion of two objects is shown in the graph below.
1) Object A is moving in uniformly accelerated motion
2) Object B is moving at velocity of 60 m/s
3) Object A and B will have the same velocity at t = 10 s
4) Object A and B will meet at t = 10 s
The correct statement:
a. 1,2,3,4
b. 1,2,3
c. 1,4
d. 2,4
e. 4 saja
6. The motion of two objects is shown in the graph below.
a. 20
b. 40
c. 60
d. 80
e. 100
7. A ball is thrown upwards with the velocity of 20 m/s. The height of the ball from the ground after 1 s is... meter.
a. 5
b. 10
c. 15
d. 20
e. 25
8. Abigail he throws a ball vertically upwards with a velocity of 2.0 m/s. What is the time taken for the ball to fall back to her hand?
a. 0.8 s
b. 0.4 s
c. 0.2 s
d. 0.1 s
e. 0.05 s
Answer these questions and show how you work out your answer.
A boy standing at the edge of a cliff of 20 m above the sea level, throws a stone straight up with a speed of 15 m/s.
a. How long does it take to reach its highest point?
b. How high does the stone rise above its release point?
c. How long will it take for the stone to reach a point of 10 m above its release point?
d. Calculate the velocity of the stone when it hits the water surface!
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