During a storm, rain comes straight down with an initial velocity of vi=-15 m/s and hits the roof of a car perpendicularly (see Figure below). The mass of rain per second that strikes the car roof is 0.061 kg/s. Assuming that the rain comes to rest upon striking the car (final velocity, vf = 0 m/s), find the average force exerted by the rain on the roof. Vf value is not included as reference for significant figures for the final answer Tip: Be careful with the direction of the final answer (force exerted by raindrop) :)   Round your answer to 2 significant figures

A 14.4-g wad of sticky clay is hurled horizontally at a 71-g wooden block initially at rest on a horizontal surface. The clay sticks to the block. After impact, the block slides d=11 m before coming to rest. The coefficient of friction between block and surface is µk=0.56. What is the normal force caused by the ground on the block/blob (again, consider them as one mass)?         2. What is the frictional force on the block/blob?        3. What is the work done by friction on the block/blob?

A Maxim machine gun fires 453 bullets per minute. Each bullet has a mass of 12g and a velocity of 660m/s.What the average force that the impact of these bullets exerts on a target? Assume the bullets penetrate the target and remain embedded in itCalculate answer to one decimal

A 0.25-kg ball, initially at reston a tee, is hit with a bat in the x-direction while 1.00 meter above the ground. If the ball hits the ground 20 meters away and was in contact with the bat for 0.10-s, what average force was exerted on the ball during the contact time?   Answer: 111 N

An 70 kg basketball player lands from a jump and tries to stop her forward motion or momentum. The normal contact force exerted by the floor on her shoes is 2800 N. The frictional force exerted by the floor on her shoes is 800 N and this force acts posteriorly on the player.  There was minimal medial-lateral force during the landing and so this component of the ground reaction force can be ignored.  What is the resultant ground reaction force exerted by the floor on the basketball player's shoes? How many times greater than the player's body weight is this resultant ground reaction force calculated in part the first part?

An 70 kg basketball player lands from a jump and tries to stop her forward motion or momentum. The normal contact force exerted by the floor on her shoes is 2800 N. The frictional force exerted by the floor on her shoes is 800 N and this force acts posteriorly on the player.  There was minimal medial-lateral force during the landing and so this component of the ground reaction force can be ignored. What is the resultant ground reaction force exerted by the floor on the basketball player's shoes?  How many times greater than the player's body weight is this resultant ground reaction force calculated in part a)?

Treat the collision as elastic.  A moving billiard ball hits an identical (except for color) stationary ball.   After the collision, the orange ball always goes off in the positive x-direction.  The final speeds are v and V.  Calculate the angle θ that the green ball goes off in.  (θ should be positive.) V0 = the initial green body's speed = 6 m/s M = the mass of both balls = 6 kg φ = the incoming green ball's angle = 70o It's always a good idea to check your answer with the momentum-conservation and energy-conservation equations.

A 48.1-kg person, running horizontally with a velocity of +3.23 m/s, jumps onto a 16.8-kg sled that is initially at rest. (a) Ignoring the effects of friction during the collision, find the velocity of the sled and person as they move away. (b) The sled and person coast 30.0 m on level snow before coming to rest. What is the coefficient of kinetic friction between the sled and the snow? (a) Number i (b) Number i Save for Later Units Units Attempts: 1 of 3 used Submit Answer

A 4.0 kg ball is traveling at 11.9 m/s and strikes a wall. The ball bounces off the wall with a velocity of 4.2 m/s in the opposite direction. If the ball is in contact with the wall for 0.10 seconds, then the magnitude of the average force on the ball during contact is? Enter only a numerical answer. Do not include units in the answer box, else your response will be counted as incorrect.

A 0.2-kg rubber egg bounces off an actor's roof, remaining in contact with it for 43 ms while changing the egg's velocity from 24.5 m/s directly toward the roof to 13.5 m/s directly away from it. Find the magnitude of the average force applied to the egg by the roof. (Be careful with units!) Fav= = N Record your numerical answer below, assuming three significant figures. Remember to include a "-" when necessary.