Assume that all the energy goes into the arrow

Reference no: EM139480

Q1. A 65 kg hiker has fallen down a hole. One rescuer attaches a rope to the injured hiker and then a second rescuer pulls the injured hiker straight up out of the hole at a steady rate. How much force would the second rescuer need to exert on the rope to do this?

Q2. An archer puts a 0.25 kg arrow to the bowstring. An average force of 220 N is exerted to draw the string back 0.95 m. imagine that air resistance is negligible. Assume that all the energy goes into the arrow, with what speed does the arrow leave bow?

Reference no: EM139480

Questions Cloud

Determine the person''s velocity just before hitting the net : A plano convex lens of focal length 16 cm is fixed on the side of the box with convex surface outside an object is placed at 26 cm from the lens find the position of the image while (1) the box is empty (2) field with water.

What is the magnitude and direction of the force : Sea Launch mission planners are going to launch their Russian launch vehicle from a Lo = 3 degrees into LEO with an inclination of 34 degrees and the longitude of ascending node of 124 degrees. Current LST at the launch site is 1140.

What would be the tension in the string : A 73 kg parachutist descends during a vertical height of 420 m with constant speed. Find the increase in entropy produced by the parachutist; assume the air temperature is 21°C.

What is the electric field between plates : A machinist starts with three identical square plates but cuts one corner from one of them, two corners from the second, and three corners from the third. Rank the 3 plates according to the x coordinate of their center of mass, from smallest to large..

Assume that all the energy goes into the arrow : A 65 kg hiker has fallen down a hole. One rescuer attaches a rope to the injured hiker and then a second rescuer pulls the injured hiker straight up out of the hole at a steady rate. How much force would the second rescuer need to exert on the rope t..

Establish the pressure that each ski exerts on the snow : A sailboat is running along a straight course with the wind providing a constant force of 55 lb. The only other force acting on the boat is resistance as the boat moves through the water. The resisting force is numerically equal to five times the boa..

Utilize the evolution of the atomic model : A cylinderical water tank of radius 10ft and height 30ft is half filled with water. How much work is essential to pump all of the water out through a hole in the top of tank.

Find the speed of the block after it has moved 3.35 m : A 75 kg parachutist descends through a vertical height of 310 m with constant speed. Find the increase in entropy produced by the parachutist, assuming the air temperature is 21°C.

Find the enhancement in entropy produced by the parachutist : A school bus takes 0.89 h to reach the school from your house. If an average velocity of the bus is 21.1 km/h to the east, what is the displacement.

User Account

All Pages