Please I want someone to answer it clearly and step by step You are driving in y
ID: 1612515 • Letter: P
Question
Please I want someone to answer it clearly and step by step
You are driving in your car at a constant speed when you suddenly apply your brakes forcefully in order to stop. You feel yourself being thrown forward because (a) A large forward force suddenly acts on you. (b) Objects in motion remain in motion. (c) The friction between you and the car seat is small. (d) Gravity pulls you forward. You are standing motionless on roller skates on a smooth (frictionless) surface. You throw a basketball horizontally forward directly away from you. (a) You recoil backwards with a speed equal to the speed of the basketball. (b) You are able to throw the basketball without recoiling backward. (c) You recoil backward with the same momentum as the basketball. (d) You recoil backward with a speed greater than the speed of the basketball. You whirl a pail of water at the end of your arm in a large vertical circle so that no water leaves the pail when it is upside down at the top of the circle. This is possible because (a) The outward centrifugal force holds the water in the bucket. (b) Gravity stops acting on the water at the top of the circle. (c) An inward centripetal force acts on the water. (d) There is no force acting on the water. A cannonball is fired horizontally from the edge of a cliff while a second cannonball is dropped vertically at the same time from the same height. Assuming level terrain over the range where the cannonballs strike the ground (a) The time for the fired cannonball to strike the ground depends on its horizontal speed. (b) Both cannonballs strike the ground at the same time. (c) The cannonballs strike the ground at the same time only if they have the same mass. (d) The one dropped vertically strikes the ground first. When playing tennis you "follow through" in hitting the ball in order to: (a) Hit the ball with maximum force. (b) Keep the momentum constant. (c) Reduce the amount of force needed to hit the ball. (d) Increase the momentum transferred to the ball.Explanation / Answer
1)due to inertia of motion he throw himself forward
so option A is correct
2)by law of conservation of momentum the initial momentum is equal to final momentum.
option c is correct
3)since the bucket is in circular motion .the necessary centrifugal(out force )is provided by normal reaction
option a is correct answer
4)both the canoon balls strike the ground at the same time option b is correct
5)force applied is equal to rate change of momentum option d is correct