A 10.8-kg block is suspended from the ceiling of an elevator by a cord rated to withstand a tension of 150 N. Shortly after the elevator starts to ascend, the cord breaks. What was the minimum acceleration of the elevator when the cord broke?

Mary applies a force of 71 N to push a box with an acceleration of 0.52 m/s². When she increases the pushing force to 81 N, the box's acceleration changes to 0.68 m/s2. There is a constant friction force present between the floor and the box. (a) What is the mass of the box in kilograms? kg (b) What is the coefficient of kinetic friction between the floor and the box? Additional Materials Reading

Figure shows the velocity graph of a 65 kg student in an elevator. What is the student's apparent weight (magnitude only) at t = 7.0 s, in Newtons? Use g = 10.0 m/s². (Hint: What is the net force?) Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement. Vy (m/s) 8- 4- (s) 10 4. 6. 8.

A 300kg weight is held aloft by a rope that passes over a pulley and is then tied down. A 100 kg person unties the rope and is pulled into the air as the weight falls. What is this person's acceleration?

A block of mass 1.90 kg is accelerated across a rough surface by a light cord passing over a small pulley as shown in the figure below. The tension T in the cord is maintained at 10.0 N, and the pulley is 0.130 m above the top of the block. The coefficient of kinetic friction is 0.370. M T (a) Determine the acceleration of the block when x = .400 m. m/s² (b) Describe the general behavior of the acceleration as the block slides from a location where x is large to x = 0. increasing, then decreasing no change O decreasing, then increasing a = (c) Find the maximum value of the acceleration and the position x for which it occurs. X = m m/s² (d) Find the largest value of x for which the acceleration is zero. m

A crate (20 kg) is hung in an elevator by a cord rated to withstand a tension of 300 N. The elevator starts at rest and begins moving upwards until the cord holding the crate breaks. What was the acceleration of the elevator when the cord broke? Assume g = 10 m/s2.

The weight of a body is 160 N. What is it's mass? Given g = 10 m/s²

Q3. If the 75-kg crate as shown in the figure Q3 starts from rest at A, determine its speed when it reaches point B. The cable is subjected to a constant force of F = 300. Neglect the friction and the size of the pulley. (2 Marks) 30° 6 m B - 6 m- -2 m- Figure Q 3

A 5kg box rests on a flat, level floor. There is friction between this box and the floor with  μs=0.40 and  μk=0.30. The box is pushed horizontally with the minimum force required to get it moving and continues to be pushed with this force afterwards. How far has the box moved after 8s. You can assume g=10 m/s2