Physics B-Day (Ashmore) 2020-21 by Mr. Ashmore Live Session 6 Questions 4
5
6
20
You are speeding your 1800 kg truck down Ferguson on a Friday night at 29 m/s. You see a squirrel in the road
and slam on the brakes to avoid hitting it. The brakes plus the road friction generate 5000 N of force on the car,
How far will your car skid before it stops? Do you hit the squirrel if you were 100 m away when you started
braking?
W =
= KE
W = Fd
KE =
mu?

Answer body lying face up ;

Iassume the answer is 75 feet. inwards to outwards rather than outwards to inwards. probably be 75.hachures are stokes drawn in direction of the steepest slope. a series of short parallel lines drawn on a map to indicate topographic relief. it is actually called hachures on contour lines. the small marks in the center of the feature are called hachures.observe the picture attached

The figure is missing but we can answer anyway.the correct answer is "releasing the string". in fact, when the person is holding the bow and the arrow, the kinetic energy of the arrow is still zero (because the arrow is not moving). the moment the arrow is released, it acquires a velocity v, so its kinetic energy will become different from zero: where m is the mass of the arrow and v its velocity.  all the other options, instead, do not increase the kinetic energy of the system: -  pulling farther back on the string : this will just increase the elastic potential energy of the system-  holding the arrow higher: this will increase the gravitational potential energy of the system (which is given by u=mgh, where h is the height above the ground)-  decreasing the mass of the arrow: this will decrease the gravitational potential energy of the system (which is given by u=mgh, where m is the mass)