A car of mass 1000kg is travelling at 20m/s when it
collides with a wall.
The front of the car collapses in 0.1 seconds,
by which time the car is at rest.
Calculate the deceleration of the car.
Calculate the force exerted by the wall on the car.

Describe how the fermi level changes with donor level, temperature and contact with p and n type semiconductors

Jasmine is diving off a 3-meter springboard. her height in meters above the water when she is x meters horizontally from the end of the board is approximated by the equation h=-x^2+3x+3. what is the maximum height jasmine will reach on her dive?

Aprojectile is launched from ground level with an initial velocity of v 0 feet per second. neglecting air resistance, its height in feet t seconds after launch is given by s equals negative 16 t squared plus v 0 t. find the time(s) that the projectile will (a) reach a height of 192 ft and (b) return to the ground when v 0equals112 feet per second. (a) find the time(s) that the projectile will reach a height of 192 ft when v 0equals112 feet per second. select the correct choice below and, if necessary, fill in the answer box to complete your choice.