Two objects are connected by a light string passing over a light, frictionless pulley as shown in the figure below. The object of mass m, = 6.80 kg is released from rest at a height h = 2.80 m above the table. (a) Using the isolated system model, determine the speed of the object of mass m, = 3.00 kg just as the 6.80-kg object hits the table. m/s (b) Find the maximum height above the table to which the 3.00-kg object rises.

An object of mass m= 7.6 kg is free to move on a horizontal surface without any friction. It is initially at rest and starts moving under a net force of F =(3N)î +(4N)ĵ . What is the object's speed in m/s after moving 1 meter?

The drawing shows two boxes resting on frictionless ramps. One box is relatively light and sits on a steep ramp. The other box is heavier and rests on a ramp that is less steep. The boxes are released from rest at A and allowed to slide down the ramps. The two boxes have masses of 10 and 31 kg. If A and B are 3.0 and 1.5 m, respectively, above the ground, determine the speed of (a) the lighter box and (b) the heavier box when each reaches B. (c) What is the ratio of the kinetic energy of the heavier box to that of the lighter box at B? (a) VB= (b) VB= (c) KEheavier KElighter Number i Number i Number i VA= 0 m/s "A=0 m/s AT K HA B hg Units Units Units <

Two objects (m1 = 4.70 kg and m2 = 2.85 kg) are connected by a light string passing over a light, frictionless pulley as in the figure below. The 4.70-kg object is released from rest at a point h = 4.00 m above the table. answer all of the follwing parts (a) Determine the speed of each object when the two pass each other. m/s(b) Determine the speed of each object at the moment the 4.70-kg object hits the table. m/s(c) How much higher does the 2.85-kg object travel after the 4.70-kg object hits the table?

A mass of 3.77 kg is launched straight upward. At some instant later it has lost 62.8 J of kinetic energy. What is the height of the object at that time, relative to its initial elevation? Assume air resistance can be ignored.

.  An electron in a television tube is accelerated uniformly from rest to a speed of 8.4×107m/s over a distance of 2.5 cm. What is the power delivered to the electron at the instant that its displacement is 1.0 cm?

A particular spring has a rest length of 5.0 cm when it is not compressed, and a length of 4.5 cm when a mass of 10kg is placed on top of it. How long is the spring with the 10kg mass on top when it is taken into an elevator accelerating upwards at 1.0 m/s2​ ​?

Assume that the force of a bow on an arrow behaves like the spring force. In aiming the arrow, an archer pulls the bow back 48 cm and holds it in position with a force of 163 N. If the mass of the arrow is 51 g and the "spring" is massless, what is the speed of the arrow immediately after it leaves the bow? v=v=  m/s A boy throws a ball of mass 0.2 kg straight upward with an initial speed of 22 m/s When the ball returns to the boy, its speed is 17 m/s How much work does air resistance do on the ball during its flight? W=W= J (give the absolute value, rounded to one decimal place)

A block of mass m1=2.40kg is connected to a second block of mass m2=1.80kg. The two masses start from rest and are moving with a speed of 2.05m/s just before m2 hits the floor.If the coefficient of kinetic friction is μk=0.350, what is the distance of travel, d, for the masses?How much conservative work was done on this system?How much nonconservative work was done on this system?

A 5.27-kg object passes through the origin at time t = 0 such that its x component of velocity is 5.50 m/s and its y component of velocity is -2.73 m/s. (a) What is the kinetic energy of the object at this time? (b) At a later time t = 2.00 s, the particle is located at x = 8.50 m and y = 5.00 m. What constant force acted on the object during this time interval? magnitude direction N o measured from the +x axis (c) What is the speed of the particle at t = 2.00 s? m/s