Physics Answers

Driver of a 1125 kg dump truck exerts a sudden break with a force 2,500 N. Calculate the magnitude of calculate the acceleration of the truck uppon sudden brake

Write down energy flow equation for non flow process. Estimate heat flow to/from the system.

Specific internal energy is 420kJ/kg at the beginning of the expansion and specific internal energy is

200kJ/kg at the end of the process. The work done by the system is 100kJ/kg during the process.

where did you get the inner diameter?

A player hits a mass kd 0.24kg moving northwards with a velocity of 15m/s thereby causing it to move with a velocity 20m/s southwards. The force of th blow acts on the ball for 0.025 . Calculate the average force exerted on the ball by the player.

A player hits a ball of mass 0.3kg which was moving eastwards with a velocity of 10m/s causing it now to move with a velocity of 15m/s westwards. The forces of the blow acts on for 0.01s . Calculate the average force exerted on the ball by the player.

A block of weight 7.0N rest on a level floor. The frictional force between the block and the floor is 1.0N. A horizontal force of 1.4N is used to pull the block for 4seconds. What is the velocity of the block after this time?

The electric motor of a model train accelerates the train from rest to 0.620 m/s in 21.0cs. The total mass of the train is 875 g. Find the average power delivered to the train during the acceleration

State Newton's first law of motion. What do you understand by inertia? Describe in an experience you have had in which inertia was involved.

State Kepler’s laws of planetary motion.

119 Shepher

Consider a large flat horizontal sheet with thickness and volume charge density. This sheet is tangent to a sphere with radius R and slame charge density as shen in Fig. 1. Let A be the pisint of urgency, and let & be the point opposite to in the tap side of the sheet. Show that the net upward clectric field (fran the sphere plus the sheet) it in larger than tAif (2/3)