AUG-4 A child is on a swing with a rope length of 5.00m. The child starts at rest at a position where the angle between the rope and the vertical is 30.0°. At the bottom of the swing, when the rope is vertical, the speed of the child V. is unknown. Find the final speed vf in m/s, using conservation of mechanical energy. at rest 5.00m h Tree branch MUND 30.0⁰ 5.00m V₁

AUG-4 A child is on a swing with a rope length of 5.00m. The child starts at rest at a position where the angle between the rope and the vertical is 30.0°. At the bottom of the swing, when the rope is vertical, the speed of the child V; is unknown. Tree branch 30.0° 5.00m 5.00m Find the final speed vɛ in m/s, using conservation of mechanical energy. at rest 0 he Vr (87 bp 2:

An object with mass m dropped from rest from height H, after travelling a distance and emerged horizontally from the bottom of the track with a velocity v and height of h. H The mechanical energy of the mass as it emerges from the bottom of the track. O mgH O mgh mgH + mv² Omgh + mv²

1. A student of mass 40 kg caries a bag weighing 5000g from the ground floor to his class on the first floor that is 700 cm high. The work done by the boy is = 2. The above diagram shows a cyclist at different positions as she cycles over a humpback bridge. The cyclist has maximum Kinetic Energy at • and maximum Potential energy at 3. A body moves a distance of 15 m along a straight line under the action of 25 N force. If work done is 45 J, then angle between the force and direction of motion of the body will be = 4. How much is the work done in pulling up a block of wood weighing 300 N for a length of 300 cm on a smooth plane inclined at an angle of 35° with the horizontal? Answer =