Exercise (Kurbias)

EXERCISE 1: 1. Add the vectors A = 13 50 o , B = 15 -60 o , and C = 17 210 o . 2. Find the resultant of the two Forces F 1 = 800 N 47 o and F 2 = 600 N 140 o . EXERCISE 2: 1. Form the dot product of A = 23 37 0 and B = 14 -35 0 . 2. Form the cross product of A = 23 37 0 and C = 47 193 0 . EXERCISE 3: 1. A train start from rest (at position zero) and moves with constant acceleration. On first observation the velocity is 20m/s and 80s later the velocity is 60m/s. At 80s, calculate the position, average velocity, and the constant acceleration over the interval. 2. Two trains are traveling along a straight track, one behind the other. The first train is traveling at 12m/s. The second train, approaching from the rear, is traveling at 20m/s. When the second train is 200m behind the first, the operator applies the brakes producing a constant deceleration of 0.20m/s 2 . Will the trains collide, and if so where and when? 3. An automobile is traveling at 60km/hr. Calculate the angular velocity of the 0.35m radius wheels. 4. A disk rotating at 30rad/s slows to 20rad/s while turning through 60 revolutions. How long does this take? 5. Calculate the angular momentum of a 3.0Kg mass at 3.0m in the-x direction and -2.0m in the-y direction and with velocity components of 20m/s in the-x direction and -30m/s in the-y direction?

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tugas ini sebagai salah satu tugas kuliah fisika untuk kelas rkbi tahun 2015

Transcript of Exercise (Kurbias)

EXERCISE 1:

1. Add the vectors A = 13 50o , B = 15 -60o , and C = 17 210o.

2. Find the resultant of the two Forces F1 = 800 N 47o and F2 = 600 N 140o.EXERCISE 2:1. Form the dot product of A = 23 370 and B = 14 -350 .

2. Form the cross product of A = 23 370 and C = 47 1930.EXERCISE 3:1. A train start from rest (at position zero) and moves with constant acceleration. On first observation the velocity is 20m/s and 80s later the velocity is 60m/s. At 80s, calculate the position, average velocity, and the constant acceleration over the interval.

2. Two trains are traveling along a straight track, one behind the other. The first train is traveling at 12m/s. The second train, approaching from the rear, is traveling at 20m/s. When the second train is 200m behind the first, the operator applies the brakes producing a constant deceleration of 0.20m/s2. Will the trains collide, and if so where and when?

3. An automobile is traveling at 60km/hr. Calculate the angular velocity of the 0.35m radius wheels.

4. A disk rotating at 30rad/s slows to 20rad/s while turning through 60 revolutions. How long does this take?

5. Calculate the angular momentum of a 3.0Kg mass at 3.0m in the-x direction and -2.0m in the-y direction and with velocity components of 20m/s in the-x direction and -30m/s in the-y direction?

6. Hang a 50Kg mass with ropes making angles of 300 and 450 as shown in Figure. Calculate the tension in the ropes.

7. What is the gravitational force of attraction between two 7.5kg bowling balls with 0.50m between centers?EXERCISE 4:1. Place a 3.0kg block at the top of a 3.4m high frictionless incline. At the bottom of the incline the block encounters a spring with a constant of 400N/m on a horizontal surface. No energy is lost to friction. How far is the spring compressed?

2. For the track shown in this figure :

take = 0.10, R = 1.0m, and L = 2.0m and find where the mass stops.

EXERCISE 5:1. Consider the classic problem of a hydraulic lift. In a typical service station 12atm is applied to the small area with the lifting column 9.0cm in radius. Find the force transferred to the large area transferred to the large area and the mass of vehicle that can be lifted.

lifting column

300

450

30Kg