the mass m1 is on a tilted surface with the height of h it is attached to a rope that is connected to a pulley and another mass m2 (both m1 and m2 have the same mass) the rope is long enough for the 2 masses to remain in equilibrium at h/2 the 2 masses were left free at t>0 1- At time t>0, find the vertical acceleration of the M2 2- Which of the two masses will move down? Calculate the time t1 that the mass will hit the ground? 3- If the block stopped in the previous paragraph when it hit the ground, but the other block continued to move, clarify whether it will hit the pulley or not. Why?

1. A spring scale is fastened to the ceiling of a railway car. When a 1.0-kg block is hung from the scale, it reads 12 N and is oriented as shown in the figure. What is the approximate acceleration of the car as measured by an observer at rest on the ground outside of the car? 07 m/s² to the right 7 m/s² to the left 12 m/s² to the right O 12 m/s² to the left It is impossible to calculate since the angle & has not been given.

Q12

#10) A dump truck fully loaded weighs 74,000.0 pounds (33.6x10³ kg). The dump truck is initially at rest on a horizontal surface. The dump truck then starts moving at its maximum constant acceleration of 0.150 m/s². The dump truck accelerates for 25.0 seconds then starts to coast. When coasting, the dump truck decelerates at a rate of 0.225 m/s². Use the initial direction of motion of the dump truck as the positive direction in your coordinate system (report answers to 3 sig figs and show all work including starting equations and algebra). (A) Find the distance the dump truck travels in the first twenty-five seconds (equations first, numbers last). obje (B) After coasting the truck will eventually come to a stop. Find the total distance traveled by the dump truck when coasting (equations first, numbers last). the x-position of the (C) From start to finish, how much time does the truck spend in motion (equations first, numbers last)?

An 810 kg dragster is being decelerated by a parachute at 2.5 m/s² as shown in the diagram. What is the tension in the cord at this moment? a) Ο Ν b) 2.0 x 10³ N O c) 5.9 x 10³ N Cord d) 7.9 x 10³ N (

Two masses are connected by a light string that runs over a frictionless pulley as shown. What is the acceleration of the system when the masses are released and allowed to move?

b) Explain how Jack could minimize the amount of time it takes for him to get toshore (consider Newton’s Second Law).

13) Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 67.0 N, the second a force of 92.0 N, friction is 22.0 N, and the mass of the third child plus wagon is 23.0 kg.  What would the acceleration be (in m/s2) if friction were 25.0 N? (Enter the magnitude.)  _____m/s2

Inertia by definition is the propter of things to resist changes in motion. This quantity is directly related to an object’s mass, or how much of ‘something’ and object is made of. Therefore, could Inertia change if your object were to travel into space? Could it change if your object was on the moon? If not, explain how you could change an object’s inertia.