Work

What is the formula for work?
Which vector has the correct components drawn for it?
Which vector has the correct components drawn for it?
Which vector has the correct components drawn for it?
What is the magnitude of the component of force parallel to the displacement?
1. 4 N
2. 2 N
What is the magnitude of the component of force parallel to the displacement of the moving rocket?
1. 3 N
2. 1 N
3. 10 N
4. 1000 N
5. 3000 N
A skydiver drops out of an airplane and opens his parachute as he drifts to the ground. Is the work done by air resistance adding or subtracting energy to the skydiver?
1. Adding energy to the skydiver.
2. Subtracting energy from the skydiver.
A car accelerates to the right. Does the car's engine add or subtract energy from the car?
1. Adds energy to the car
2. Subtracts energy from the car
A wagon is moved from the left to the right by a force as shown. Is energy being added or subtracted from the wagon by the force?
1. Energy is being added to the wagon.
2. Energy is being subtracted from the wagon.
A car is towed as shown below. How much work is done by the 5000 N force?
1. (5000N) cos20°
2. (5000N) 35m.
3. (5000N)(sin20°)(35m)
4. (5000N)(cos20°)35m
So far there are two ways to calculate work. Method 1 is to use the formula W=F_lld. The second method says the work is the change in... this quantity. What is the quantity?
1. any energy
2. kinetic energy
3. potential energy
4. thermal energy