Homework Answers

What are the details of briefly explain the scope of digital system design?

A car is speeding up and has an instantaneous velocity of 1.0 m/s in the +x-direction when a stopwatch reads 10.0 s. It has a constant acceleration of 2.0 m/s² in the x-direction.

(a) What change in speed occurs between t = 10.0 s and t = 12.0 s?

(b) What is the speed when the stopwatch reads 12.0 s?

:An attractive force of 12kN is experienced by two charges of magnitude 4nC and 7nC. At what

distance must these two charges be to experience this force?

8. A ball rolls horizontally with a speed 0f 7.6 m/s off the edge of a tall platform. If the ball lands 8.7 m from the point on the ground directly below the edge of the platform, what is the height of the platform?

9. A stone thrown off a bridge 20 m above a river has an initial velocity of 12 m/s at an angle of 45° above the horizontal.

What is the range of the stone?

At what velocity does the stone strike the water?

26. A ball with a horizontal speed of 1 m/s rolls off a bench 2 m high.

How long will the ball take to reach the floor?

How far from a point on the floor directly below the edge of the bench will the ball land?

27. An electron is ejected horizontally at a speed of 1.5 X10⁶ m/s from the electron gun of a computer monitor. If the viewing screen is 35 cm from the end of the gun, how far will the electrons travel in the vertical direction before hitting the screen?

A young girl standing on a bridge throws a stone with an initial velocity of 12 m/s at a downward angle of 45° to the horizontal, in an attempt to hit a block of wood floating in the river below. If the stone is thrown from a height of 20 m and it just reaches the water when the block is 13 m from the bridge, does the stone hit the block?

Suppose a golf ball is hit off with the tee with an initial velocity of 30 m/s at an angle of 35° to the horizontal.

What is the maximum height reached by the ball?

What is its range?