A sled with mass 30 kg slides 40 m down a hill angled at 20 degrees to the horizontal. The coefficient of friction between the sled and the ground is 0.2. a) How much work does gravity do on the sled? b) How much work does the normal force do on the sled? c) How much work does friction do on the sled? d) What is the net work done on the sled e) if the sled begins at rest...
Starting from rest, you drag a 30.0 kg box as shown below. Your force is 200.0 N while friction applies a 185 N force. What is the box's speed if you drag it across the ground for 5.00 meters? ______________ m/s With a starting velocity of 2 m/s to the right, you drag a 30.0 kg box for 4 meters, as shown below. Your force is 200.0 N and the box's final velocity is 1.15 m/s to the right. How...
1. A 40-kg child sits on a swing held by a light rope. At the low point of the swing, the child is moving 4 m/s. How high above the low point will the child rise before they stop? 2. A cannon ball is fired upward at 45 degrees above the horizontal and rises to a max height of 1000 m. What is the muzzle velocity of the cannon? 3. A cannon ball is fired upward at 45 degrees above...
Alkg o.lom A box with mass M=1 kg is on an incline with angle 0=30 degrees with horizon. The coefficient of friction between the box and the inclined is u=0.1. a) If the box is let go from rest, how long t=? does it take it to move distance d=1 m along the surface of the inclined? b) What minimum force f=? Perpendicular to the surface of inclined is need so that the box does not move down the inclined?...
40 F (N) 30 20 10 20 40 d (cm) A force, shown in the graph above, is applied to a block of mass, m = 2.3 kg that is initially at rest. What is the speed of the block when it reaches 40 cm? Question 2 4 pts A 3.00 meter long bar that has a mass of 14.0 kg is supported by a cable that makes an angle of 30.0 degrees with the bar. A 23.0-kg ball is...
QUESTION 1 Two skaters, one of mass 80 kg, the other of mass 40 kg, are standing next to each other on frictionless ice rink. The 40 kg skater pushes the 80 kg skater. After the push, the 80 kg skater is going at 1 m/s. How fast and in what direction is the 40 kg skater going after the push? (HINT: use the fact that since there are no external forces, the velocity of the center of mass of...
during the throwing motion, a softball player exerts an average
force of 100N against 0.25 KG ball while moving through a
horizontal displacement of 1.3m before release. The angle between
the force and displacement is 0°. The amount of work performed by
the player on the softball was?
QUESTION 24 During the throwing motion a sofball player exerts an average of 100 Nagainst the 0.25 ball while moving through a horizontal displacement of 1.3 m before release. The angle between...
A force of 30 N accelerates a 2.0 kg object from rest for a distance of 3.0 m along a level, frictionless surface; the force then changes to 15 N and acts for an additional 2.0 m. (a) What is the final kinetic energy of the object? (b) How fast is it moving?
3.) A 60.0 kg box is pulled by a 275 N force of tension provided by a rope pulled at an angle 30.0 degrees above the horizontal. The box moves 25.0 m horizontally as it is pulled by the rope. The coefficient of friction between the box and the ground is uk-0.20 a.) How much work does the rope do on the box? (5 pts) b.) How much work does friction do on the box? (5 pts) c.) How much...
1a . A constant force of 32.3 N pulls on a 20 kg block on a horizontal surface. The force is directed at 30o above the horizontal. A friction force impedes the motion. If at the start of the motion the block was at rest and after 11 meters it has a velocity of 3, what is the coefficient of friction? 1b. What is the work done by the constant force when the block is moved 8 meters? 2.What constant,...