# midterm

 50 Ice Age Mixed Review Sid the sloth is running from the rhinos, hits Manny the mammoth and bounces off of him. This is an example of - What is an elastic collision? 100 IAR Pinky takes his first steps from Manfred towards Sid, traveling 5 meters East in 20 seconds. Pinky then loses his balance and changes his direction, walking South for 4 seconds towards Diego 7 meters away. Pinky’s average speed from Manny to Diego; his average velocity – •What is 0.36 m/s? R2 = 52 + 72 d= 8.6 m, SE v= 8.6m/24s = 0.36 m/s 150 IAMR Carl and Frank, two prehistoric rhinos, are engaged in a shoving match against Manny the mammoth. Both rhinos have a mass of 1500 kg each while Manny has a mass of 2500 kg. The rhino’s push Manny and cause him to accelerate backwards at 0.3 m/s2. The force exerted on Manny by the rhinos is •What is F=ma or 750N? 200 IAMR The last encounter has Manny and the bad sabertooth tiger, Soto, fighting each other. Manny tosses the 250 kg Soto (at rest) horizontally into a rock with a final velocity of 22 m/s. Manny’s tusks are in contact with Soto for a time of 1.2 secs while tossing him. The force on Soto is What is Ft = Dmv or 4583N? 200 IAMR Sid the Sloth (m=30kg) has gabbed hold of a melon and must run through a swarm of resting dodo birds, each weighing 5 kg. Sid begins with an initial velocity of 40 m/s. How many dodos can Sid have an inelastic collision with until his speed falls below 2m/s. Do the calculation. •What is m1v1 + m2v2 = (m1+m2)vf ? •What is 114 dodo birds? 50 Speed and Velocity •Define the term speed. Is it a vector or a scalar. •What is the change in distance over time? •What is a scalar? 100 Speed and velocity An object moves a distance of 10 m in 5 seconds. The average speed of the object is a. 0.5 m/s c. 40 m/s b. 2.0 m/s d. 50 m/s What is answer b. 2.0 m/s? V= d/t =10m / 5s = 2.0 m/s 150 S and V As a cart travels around a horizontal circular track, the cart MUST undergo a change in a: velocity b: speed c: inertia d: weight What is a: Velocity ? Velocity has direction in its measurement, circle motion must have a constant change in direction. 200 S and V The term at in the equation v= v0 +at represents what quantity? a) object’s position b) object’s speed c) object’s acceleration d) object’s time What is b: object’s speed ? 250 S and V The average speed of a plane was 600 kilometers per hour. How long did it take the plane to travel 120 km? a: 0.2 h b: 0.5 h c: 0.7 h d: 5 h What is a : 0.2 h ? v = d / t 600 km /h = 120 km / t t = 120 km / 600 km / h t = . 2 h? AuthorAnonymous ID4701 Card Setmidterm Descriptionmidterm Updated2010-01-22T03:45:36Z Show Answers