Mr. Edward’s Find the initial velocity of the 2000 kg car pictured below.

A) 21 m/s B) 9 m/s C) 17 m/sD) 23 m/s

Mrs. Mistry’s Find the final velocity of the 20 kg bike pictured below.

A)20 m/s B) 17 m/s C) 14 m/sD) 12 m/s

Mr. Wilkinson’s Two skate boarders collide while traveling in the same direction. Skate boarder 1 has a mass of 70 kg and a initial velocity of 6 m/s and skate boarder 2 has a mass of 55 kg with an initial velocity of 5m/s. Skate boarder 1 has a final velocity of 4 m/s in the same direction after the collision, what is the speed of skate boarder 2 after the collision?

A)9.2 m/s B) 7.55 m/s C) m/sD) 17.7 m/s

Stairwell (not next to Skybridge, other side of F-hall) Two football players collide head-on. The defensive player has a mass of 100 kg the offensive player has a mass of 90 kg. What is the speed of the offensive player after the collision? (defense) (offense) AFTER (defense) 100 kg------> 6 m/s 2 m/s 1 m/s

A)7.56 m/s B) 5.33 m/s C) 8.03 m/sD) 3.56 m/s

House 500 The 12,000 kg plane traveling 175 m/s east collides with 25,000 kg traveling 130 m/s to the west. The planes collide and stick together. What is the velocity of the stuck planes after the collision?

A)-31.1 m/s B) m/s C) m/sD) m/s

Mr. Hogan’s An 85.0 kg fisherman jumps from kg rowboat. If the velocity of the jumping fisherman is 4.7 m/s to the west to land on the dock, what is the final velocity of the boat?

A)-2.67 m/s B) m/s C) 3.41 m/sD) 2.67 m/s

Mr. Hudson’s A 2 kg blob of putty moving at 3 m/s slams into a 2 kg blob of putty at rest. Calculate the speed of the two stuck-together blobs of putty immediately after colliding.

A)2.66 m/s B) 3.1 m/s C) 1.50 m/sD) 2.2 m/s

Ms. Cole’s A 1 kg dart moving horizontally at 10 m/s strikes and sticks to a wood block of mass 9 kg (initially at rest), which slides across a friction-free level surface. What is the speed of the block and the dart (one item) after the collision?

A)-2.3 m/s B) 2.3 m/s C) -1.0 m/sD) 1.0 m/s

Eagle Academy A kg foam bullet is fired from a 2 kg Nerf gun. If the foam bullet’s velocity is 14 m/s to the east, what is the recoil velocity of the Nerf gun?

A) m/s B) m/s C) 0.56 m/sD) m/s

Mr. Gumpf’s Teresa and Samir are driving bumper cars. They spot each other across the rink and head straight for each other at full speed. Samir and his car (130 kg total) head east at 3.5 m/s while Teresa and her car (110 kg total) head west at 3.0 m/s. They have an elastic collision when they meet and Samir (and car) bounces backwards at 2.4 m/s. What is Teresa’s speed after the collision?

A)-3.97 m/s B) 3.97 m/s C) 4.3 m/sD) -4.3 m/s

Skybridge 2 ice skaters collide while traveling in the same direction. Ice skater 1 has a mass of 62 kg and a initial velocity of 7 m/s and ice skater 2 has a mass of 45 kg with an initial velocity of 4m/s. Ice skater 1 has a final velocity of 4 m/s in the same direction after the collision, what is the speed of ice skater 2 after the collision?

A)19.2 m/s B) 8.13 m/s C) 20.5 m/sD) 12.2 m/s

Mrs.Holloway’s A 5 kg fish swims 1 m/s and swallows a brave 1 kg fish swimming toward it at 4 m/s. What is the speed of the large fish immediately after dinner?

A)1.5 m/s B) 0.33 m/s C) m/sD) 2.5 m/s

Mrs. Crowe’s A railroad diesel engine with a mass of 40,000 kg coasts at 6 km/h to the right into a freight car with a mass of 10,000 kg that is traveling to the right at 2 km/h, how fast do the two coast after they couple together? (An answer in km/h is acceptable.)

A)5.2 m/s B) 7.0 m/s C) 7.2 m/sD) 6.2 m/s

Mr. Hammond’s Brakes are applied in bringing a 1200 kg car moving at 25 m/s to rest in 20.0s. Find the braking force required.

A)1500N B) -3500N C) 2500ND) -1500N

Mrs. Marlow’s A car with a mass of 1000 kg moves at 20 m/s. What braking force is needed to bring the car to a halt in 10 s?

A)2000N B) -2000N C) 1500ND) -3000N

F Hall Entrance What is the speed of the 25,000kg train starting from rest after 15s of forward thrust force = 1.00 x 10 5 N ?

A) 75 m/s B) -60 m/s C) 60 m/sD) -55 m/s