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/25 Q1 (25 marks) (a)The motors at A and B draw in their attached cables with an acceleration of ...
QUESTION 1 Use the block pulley system below to answer the following questions. The mass of...
QUESTION 1 Use the block pulley system below to answer the following questions. The mass of block A is 50 kg. A What is the magnitude of F in Newtons such that block A moves with an acceleration of 3 m/s2. What is the magnitude of F in Newtons such that block A moves with an acceleration of 3 m/s 160 QUESTION 2 How many seconds will it take for block A to reach a velocity of 4 m/s starting...
A. The drum of a laundry machine, starts from rest and reach an angular speed of...
A. The drum of a laundry machine, starts from rest and reach an angular speed of 50 rps, in 8 sec when suddenly someone opens the lid, and the laundry machine undergoes a decelerating cycle to stop after 10 sec. i. What is the acceleration of the drum during the first 8 sec? (2 marks) ii. How many revolutions will it rotate to reach this velocity. (2 marks) iii. What is the acceleration when the machine was going to rest...
8. A rocket is launched vertically upwards and experiences an acceleration of 4x10 m.s2 for 8...
8. A rocket is launched vertically upwards and experiences an acceleration of 4x10 m.s2 for 8 seconds. After this time, the engine is turned off and the rocket continues to rise to its maximum height. (a) Explain (using Newton's third law) why the rocket moves forward during the first 8 seconds. (2) (b) Calculate the velocity of the rocket 8 seconds after launching (2) (c) How long after launching does the rocket reach its maximum height? (2) (d) (2) At...
After a space station is constructed, it is spun up from rest, using rockets attached tangentially...
After a space station is constructed, it is spun up from rest,
using rockets attached tangentially to the outside hull, in order
to simulate earth gravity for the occupants inside, shown in the
figure. We can model the station as a hoop that rotates around its
axis, and ignore the rest of the structure for the moment of
inertia.
The mass of the station is m = 50,000 kg, the outer
radius is r = 100 m.
a) The two...
Q1 (b) A truck A pulls a crate B up a slope that is inclined at...
Q1 (b) A truck A pulls a crate B up a slope that is inclined at an angle of 150 to the horizontal, as shown in Figure Q1(b). The rope passes over a pulley of negligible size at C. At the instant shown, r 30 m, 0-45o and the truck has a speed of vA 20 km/h and an acceleration ax-0.2 m/s i) Express the velocity components of the crate B along the rope (4 marks) BC and transverse to...
14. Two masses are connected by a string which passes over a pulley with negligible mass...
14. Two masses are connected by a string which passes over a pulley with negligible mass and friction. One mass hangs vertically and one mass slides on a frictionless 30.0 degree incline. The vertically hanging mass is 6.00 kg and the mass on the incline is 4.00 kg. The magnitude of the acceleration of the 4.00 kg mass is 15. Two masses are connected by a string which passes over a pulley with negligible mass and friction. One mass hangs...
You board a stationary elevator on the ground floor. A uniform vertical gravitational field g =...
You board a stationary elevator on the ground floor. A uniform vertical gravitational field g = −9.8m/s2 is present. Before the elevator starts moving, you drop a ball from a height of 2 m above the floor. a) How long does it take for the ball to reach the floor of the elevator? b) How long does it take for the ball to travel from the floor to its maximum height above the floor (at which point you catch it...
/25 04 (25 marks) (a) A spool has a mass m 0.5 kg, radius r 0.1...
/25 04 (25 marks) (a) A spool has a mass m 0.5 kg, radius r 0.1 m, moment of inertia about the center of mass Ic-4m2 2.5 x 103 kgm2. The end of the string of the spool is held at the point H with the right hand as shown in Figure Q4(a). Initially, the spool is held with the left d and the system is at rest. Answer the following questions supposing that the spool is gently released from...
→XCIO D Question 11 7.5 pts An object moves in the x direction only under a...
→XCIO D Question 11 7.5 pts An object moves in the x direction only under a constant acceleration. It's acceleration is 3 m/s in the *x direction. It is originally moving at 14 m/s in the direction. How long does it take in seconds, to travel a displacement of 22 m in the ex direction? Hint: Find the velocity at this displacement similar to the last question, first. Question 12 7.5 pts Car 1 is at rest at a traffic...
1. A car accelerates from zero to 105 km/h in 5.21 s. What is its average...
1. A car accelerates from zero to 105 km/h in 5.21 s. What is its average acceleration in km/h/s and m/s? 2. An object moving in the x-direction has a position described by the function x(t) - 6.30t + 8.70t2, where t is in seconds and x is in meters. What is the acceleration as a function of time? The figure shows the graph of v vs t for the motion of a motorcyle that starts from rest and moves...
QUESTION 1 Use the block pulley system below to answer the following questions. The mass of block A is 50 kg. A What is the magnitude of F in Newtons such that block A moves with an acceleration of 3 m/s2. What is the magnitude of F in Newtons such that block A moves with an acceleration of 3 m/s 160 QUESTION 2 How many seconds will it take for block A to reach a velocity of 4 m/s starting...
A. The drum of a laundry machine, starts from rest and reach an angular speed of 50 rps, in 8 sec when suddenly someone opens the lid, and the laundry machine undergoes a decelerating cycle to stop after 10 sec. i. What is the acceleration of the drum during the first 8 sec? (2 marks) ii. How many revolutions will it rotate to reach this velocity. (2 marks) iii. What is the acceleration when the machine was going to rest...
8. A rocket is launched vertically upwards and experiences an acceleration of 4x10 m.s2 for 8 seconds. After this time, the engine is turned off and the rocket continues to rise to its maximum height. (a) Explain (using Newton's third law) why the rocket moves forward during the first 8 seconds. (2) (b) Calculate the velocity of the rocket 8 seconds after launching (2) (c) How long after launching does the rocket reach its maximum height? (2) (d) (2) At...
After a space station is constructed, it is spun up from rest,
using rockets attached tangentially to the outside hull, in order
to simulate earth gravity for the occupants inside, shown in the
figure. We can model the station as a hoop that rotates around its
axis, and ignore the rest of the structure for the moment of
inertia.
The mass of the station is m = 50,000 kg, the outer
radius is r = 100 m.
a) The two...
Q1 (b) A truck A pulls a crate B up a slope that is inclined at an angle of 150 to the horizontal, as shown in Figure Q1(b). The rope passes over a pulley of negligible size at C. At the instant shown, r 30 m, 0-45o and the truck has a speed of vA 20 km/h and an acceleration ax-0.2 m/s i) Express the velocity components of the crate B along the rope (4 marks) BC and transverse to...
14. Two masses are connected by a string which passes over a pulley with negligible mass and friction. One mass hangs vertically and one mass slides on a frictionless 30.0 degree incline. The vertically hanging mass is 6.00 kg and the mass on the incline is 4.00 kg. The magnitude of the acceleration of the 4.00 kg mass is 15. Two masses are connected by a string which passes over a pulley with negligible mass and friction. One mass hangs...
/25 04 (25 marks) (a) A spool has a mass m 0.5 kg, radius r 0.1 m, moment of inertia about the center of mass Ic-4m2 2.5 x 103 kgm2. The end of the string of the spool is held at the point H with the right hand as shown in Figure Q4(a). Initially, the spool is held with the left d and the system is at rest. Answer the following questions supposing that the spool is gently released from...
→XCIO D Question 11 7.5 pts An object moves in the x direction only under a constant acceleration. It's acceleration is 3 m/s in the *x direction. It is originally moving at 14 m/s in the direction. How long does it take in seconds, to travel a displacement of 22 m in the ex direction? Hint: Find the velocity at this displacement similar to the last question, first. Question 12 7.5 pts Car 1 is at rest at a traffic...
1. A car accelerates from zero to 105 km/h in 5.21 s. What is its average acceleration in km/h/s and m/s? 2. An object moving in the x-direction has a position described by the function x(t) - 6.30t + 8.70t2, where t is in seconds and x is in meters. What is the acceleration as a function of time? The figure shows the graph of v vs t for the motion of a motorcyle that starts from rest and moves...
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