A The 75-kg crate starts from rest at A. The cable is subjected to a constant force of F 240 N. Neglect friction and the size of the pulley. (Figure 1)
Part A
Determine the speed of the crate when it reaches point B.
If the 75-kg crate starts from rest at A, and its speed is 6 m/s when it passes point B, determine the constant force F exerted on the cable. Neglect friction and the size of the pulley.
If the cord is subjected to a constant force of F 300 N and the 16 kg smooth collar starts from rest at A, determine the velocity of the collar when it reaches point B. Neglect the size of the pulley. (Figure 1)
If the cord is subjected to a constant force of F = 300N and the 15 kg smooth collar starts from rest at A, determine the velocity of the collar when it reaches point B. Neglect the size of the pulley. ANSWER: 3.34 m/s
Q3 Figure 3.1 shows a 100 kg crate starts from rest and achieves a velocity of v = 3 m/s when it travels a distance of 6 m to the right. Determine the magnitude of force P acting on the crate if: (a) the coefficient of kinetic friction between the crate and the floor is 0.35. (15 marks) (b) the contact between the crate and the floor is smooth. (10 marks) P 30° Figure 3.1: A crate moved by force...
3. A 75 lbr crate shown starts from rest and is pulled up the slope ( 25) by a cable with a constant tension of 60 lbr. Use the impulse momentum equation to determine the time in seconds for it to reach a velocity of 15 ft/s. (20 pts) O. 30°
2. A 300 kg crate is pulled starting from rest by a motor and a pulley and string. The motor is pulling with a force 3T, where, T = 120t2 + 3. kinetic friction of coefficient, pk = 0.4; static coefficient of friction H = 0.3. Determine the speed of the crate after 6 s. (10 pts) 3T
A 5-kg collar A is at rest on top of, but not attached to, a spring with stiffness k1 = 400 N/m when a constant 150-N force is applied to the cable. Knowing A has a speed of 1 m/s when the upper spring is compressed 75 mm, determine the spring stiffness k2. Ignore friction and the mass of the pulley
If the 50-kg crate starts from rest and travels a distance of 6 m up the plane in 4 s, determine the magnitude of force P acting on the crate. The coefficient of kinetic friction between the crate and the ground is μk = 0.25.
2. A crate is pushed horizontally at an angle of 20° across a rough surface as shown. The mass of the crate is 55 kg and the coefficient of kinetic friction M = 0.35. a) What applied force is required to keep the box moving at a constant acceleration of 3m/s2 ? b) What applied force is needed to keep the box moving at a constant speed, that is, no acceleration? (2 pts.) 3. A 60-kg skier starts from rest...
QESTION 3 (a) If the coefficient of kinetic friction between the 50 kg crate shown in Figure Q3(a) and the ground is u = 0.18, determine the speed of the crate and its displacement when time t = 2 s. The crate starts from rest and is towed by the 40 kg force. (8 marks) 40 kg 30° Figure Q3(a)