Question 1 A ball (m= 0.2kg and V1 = 8 m/s) is moving toward a wall ( V= 0) and after a collision, returns with V2 = 2 m/s ( Opposite direction) a. What is the momentum before and after collision? b. Is it an elastic or inelastic collision? Why? O a) p( before) = 1.6 kg m/s p(after) = -0.4 kg m/s b) it's an elastic because Kinetic energy is constant before and after collision O a) p( before) = 1.6 kg m/s p(after) = -0.4 kg m/s b) it's an inelastic because velocity of the ball changed after collision. O a) p( before) = 1.6 kg m/s p(after) = -0.4 kg m/s b) it's an inelastic because Kinetic energy is not constant before and after collision O a) p( before) = 1.6 kg m/s p(after) = 0.4 kg m/s b) it's an elastic because Kinetic energy is not constant before and after collisionQuestion 2 Which statement is the best description for static friction? O Static friction is always constant for all objects O Magnitude of the static friction is variable, starting from zero up to a maximum value( depend on different materials) Static friction is always in the oposit direction of the motion Question 3 What is the kinetic energy of an object with m= 250 9 if the velocity is V = 2.8m/s O K: 980j O K=980j OK=-0.98j Q K=O.98j /i\\ Moving to another question will save this response. Question 4 of 9 QueStlon 4 2 points Save Answer In the following situations what is the magnitude and the direction of the acceleration of following object affected by external forces F1 = 10M and F2 = 15 N and consider the kinetic friction of f = 5 N : M=5kg * O a = 4 m/s2 to the left O a = 4 m/s2 to the right O a = 5 m/s2 to the right O a = 5 m/s2 to the left Question 5 A car ( m= 1500 kg) is moving with 72 km/h ( = 20 m/s) How much force is required to stop this car in 5 seconds. 0 F = 6000 N O F = 6000 N O F = - 150,000 N O F = 150,000 N Question 6 You are traveling from point A to B on the following route: From A, move 12 km to the East, and 15 km to the West, ( here is point B). If this takes 45 min, find the average velocity based on km/h O V = 4 km/h to the west O V = 36 km/h to the west O V = 4 km/h to the east O V = 36 km/h to the eastQuestion 7 2 points Save Two objects with different mass ( m1 = 0.2 kg, m2 = 0.1 kg) from the same height and with no initial velocity release at the same time( no air resistance), which one will reach the ground first? Om'l Om2 O They will reach at the same time Question 8 3 points You are traveling from point A to B on the following route: From A, move 20 km to the East, 10 km to the North and finally 20 km to the West, ( here is the point B). a) find the total displacement b) find the total distance traveled O a) total displacement = 10 km to the west b) total distance = 50 km O a) total displacement = 10 km to the North b) total distance = 50 km O a) total displacement = 50 km to the North b) total distance = 10 km O a) total displacement = 10 km to the South b) total distance = 50 kmQuestion 9 3 points In the follwoing situation two objects had a collision but we don't have any infor mation regarding their velosities before and after the collision. If these tw ball were in touch for t= 0.015 s, and the applied force from each was F = 25 N, can you calculate the amount of change in the momentum for each one? V3 V2 V4 O P2 - P1 = 0.375 O P2 - P1 = 0 O P2 - P1 = 1666.67 O we can't calculate based on this information. A Click Submit to complete this assessment.