. In addition to the final velocity of the block, which of the following information would students need to test the hypothesis that the work done by the net force on the block is equal to the change in kinetic energy of the block as the block moves from
Question
. In addition to the final velocity of the block, which of the following information would students need to test the hypothesis that the work done by the net force on the block is equal to the change in kinetic energy of the block as the block moves from
Solution
To test the hypothesis that the work done by the net force on the block is equal to the change in kinetic energy of the block, students would need the following information:
-
Initial Velocity of the Block: This is needed to calculate the initial kinetic energy of the block. Kinetic energy is given by the formula 1/2 mv^2, where m is the mass and v is the velocity.
-
Mass of the Block: This is needed for both the calculation of work done and the kinetic energy.
-
Distance over which the Force is Applied: Work done is calculated as the product of force and the distance over which it is applied.
-
The Force Applied on the Block: This is needed to calculate the work done on the block.
-
The Direction of the Force and the Direction of the Block's Motion: Work done is the dot product of force and displacement vectors. If the force is applied in the direction of motion, it does positive work. If it is applied in the opposite direction, it does negative work.
-
Final Velocity of the Block: This is needed to calculate the final kinetic energy of the block.
With these pieces of information, students can calculate the work done on the block and the change in kinetic energy, and then compare the two to test the hypothesis.
Similar Questions
A block of mass m = 2.50 kg is pushed a distance d = 2.20 m along a frictionless,horizontal table by a constant applied force of magnitude F = 16.0 N directed at anangle θ = 25.0° below the horizontal. Determine the work done on the block by:(a) the applied force.(b) the normal force exerted by the table.(c) the gravitational force.(d) the net force on the block.
The sophomore students at the University of California in Los Angles are performingan experiment in Work-Energy Principle and Conservation of Mechanical Energy. Aspring whose scale is 12 N/mm is compressed by 150 mm using a 1000N block. If theblock is released, compute the total distance the block will slide. Assuming that thecoefficient of friction is .
(c) Determine the friction force exerted on the block (assumed to be constant).
A block made of glass and a block made of wood have the same mass. Each block is pulled by a rope at constant speed the same distance along a horizontal steel surface. Would the same amount of work be required to pull the glass block as the wood block?A.Yes, because the masses of the blocks are the sameB.Yes, because the blocks are pulled along a horizontal surfaceC.No, because the coefficients of static friction for the block materials on steel are differentD.No, because the coefficients of kinetic friction for the block materials on steel are different
A 1.5 kg block is initially at rest on a horizontal frictionless surface when a horizontal force along an x axis is applied to the block. The force is given by F→ (x) = (2.5 − x 2 ) ˆ i N, where x is in meters and the initial position of the block is x = 0. (a) What is the kinetic energy of the block as it passes through x = 2.0 m? (b) What is the maximumkinetic energy of the block between x = 0 and x = 2.0 m?
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.