A 5kg box moves at 3m/s and a 3kg box moves at 5m/s. a) Which has more inertia? b) If they run into each other, which
will experience the greater force? c) If they run into each other, which will experience the greater acceleration?
( a ) Inertia is proportinal to mass of the object. An object which has greater the mass will have greater inertia. Here velocity of object doesn't involve.
Thus 5 kg box has more inerita as compared to 3 kg box
( b ) Force is rate of change of momentum.
For the both, the momentum is same, 15 kg.m.s. Thus 5 kg box and 3 kg box possses same froce if they run into each other.
( c)
Newton's second law state definition of force F = ma
acceleration, a = F / m
For the same force, less the mass will possess greater acceleration. Thus, 3 kg box have greater acceleration as compared to 5 kg box.
A 5kg box moves at 3m/s and a 3kg box moves at 5m/s. a) Which has...
A ball, with a mass of 5kg, accelerates in the +x direction with a magnitude of 5m/s^2 and in the -y direction with a magnitude of 2 m/s^2. 1. What is the acceleration vector that describes this motion? 2. What is the net force vector on this ball? Hint: Use Newton's 2nd Law!
1) Consider two boxes: box B, with a mass of 3kg, placed on top box A, with a mass of 10kg. If box A is pushed with a force of 70N, what is the force of friction on box B? The coefficients of friction between boxes A and B are µs = 0.7 and µk = 0.4, while friction is negligible between box A and the ground. 2) A 1.5kg box is pushed up a 30o incline with a force...
5.) A belt travelling at 3m/s wraps around two separate disks. Disk 1 has a mass of 5kg and radius of 30cm, while disk 2 has a mass of 2kg and radius of 5 cm. a) What is the angular velocity of disk 1? b) What is the angular velocity of disk 2? c) What is the moment of inertia of the two disk system?
A 2 kg mass traveling at 5m/s undergoes a constant acceleration and comes to a stop in 10 seconds. a) what acceleration does it experience? b) how far does it go during the time it is coming to a stop? c) What net force does the mass experience as it comes to a stop? A 75 kg mass accelerates from rest at a rate of 2m/s2 over a distance of 50m a) How fast is it going after covering a...
A 5kg block is placed on a 2kg pallet which sits on the floor. The coefficients of friction between the block and the pallet are 0.6 and 0.8. The coefficients of friction between the pallet and the floor are 0.3 and 0.4. A rope is attached to the 5kg block and pulls horizontally with an unknown force Fa. a) If the rope pulls to the right so the pallet slides along the floor, but the block does NOT slide on...
A horizontal force of 80 pounds is exerted on a box which moves the box 10 feet across a horizontal floor in 5 seconds. What is the power generated by this force? a) 0.66 hp b) 0.34 hp c) 0.29 hp d) 0.51 hp
WE-3 Atx-2m a 3kg block has a Velocity of +4m/s. The net FN)20 force on the block (magnitude and direction) is shown as a function of position on the figure to the right. a) Find the net work done on 15 -5 -10 -15 -20 the block as it moves from x-2m to x-8m b) Find the kinetic energy of -25 the block at x-8m
10. In the figure below, a box slides down an incline. As the box moves from point A to point B, which are 5.0 m apart, an applied force acts on the box. The force has a magnitude of 2.0 N and is directed down the incline. The magnitude of the frictional force acting on the box is 10 N. If the kinetic energy of the box increased by 35 J between A and B, how much work is done...
An electron moves with speed 5.0 times 10^5m/s in a uniform magnetic field of strength 0.60 T that points Hast. At some instant, the electron experiences an upward magnetic force of magnitude 4.0 times 10^14 N. In what direction is the electron moving at that instant? [If there is more than one possible direction, describe all the possibilities.] On a carefully drawn and labeled diagram, show the (possible) direction(s) of the electron's velocity relative to the magnetic field and the...
2. The elevator shown in the figure moves downward with constant velocity of 5m/s. Determine a) the velocity of the cable "C b) the velocity of the counterweight "w" c) the relative velocity of the cable C with respect to the elevator d) the relative velocity of the counterweight W" with respect to the elevator