1. In an intersection, a bus moving at (100i) m/s and a truck moving at (200j) m/s collided with each other. Assuming that the two objects have the same mass, what would be their final speed together?

1 Z :: F1 @ 2 W S Question 6 of 14 View Policies Current Attempt in Progress Number i Given the quantities a = 5.9 m, b = 9.9 s, c = 97 m/s, what is the value of the quantity d = a³ ch² X eTextbook and Media Save for Later 0: F2 # 3 00: E D 80 Q F4 F Units JAN 20 A % 5 V 9 F5 T G ^ 6 c F6 Y & 7 H ← F7 00 8 Attempts: 0 of 5 used DII F8 ( 9 F9 K -/6 Submit Ans F10 L

10 11 12 3. The plot above shows the position vs. clock reading of a body. Label the axes accordingly. Then label the following regions of the graph. a. When is the body traveling in the positive direction? (Label those segments "Positive velocity.") b. When is the body traveling in the negative direction? (Label those segments "Negative velocity.") c. When is the body at rest? (Label those segments or points "Rest.") d. When is the body undergoing zero acceleration? (Label those segments "UM.") e. When is the body speeding up? (Label those segments "Speeding Up.") f. When is the body slowing down? (Label those segments "Slowing Down.") g. When is the body accelerating while also at rest? Draw a star on any such point/s.

1. If both the mass and speed of an object are doubled while the radius is decreased by 4x, then the centripetal force is? 2. A 5 kg object has a kinetic energy of 90 Joules. What is the speed of this object? 3. The momentum of a 500 g object is 2000 kg m/s. What is the speed of this object? 4. A ball is thrown straight upward at an initial speed of 70 m/s. What is the acceleration of the object after 13 seconds? 5. An object is thrown straight upward with a speed  of 90 m/s. What is the speed of the object after 13 seconds?

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Item 6 An astronaut, whose mission is to go where no one has gone before, lands on a spherical planet in a distant galaxy. As she stands on the surface of the planet, she releases a small rock from rest and finds that it takes the rock 0.560 s to fall 1.90 m. ▼ Part A If the radius of the planet is 7.60 x 107 m, what is the mass of the planet? Express your answer with the appropriate units. mp = Submit LOI 7 μA 3 Value Provide Feedback → Units Previous Answers Request Answer ? 4

this is a physics course question

15. A pilot of mass 75 k plane is flying man normal? the she nears it feels four times heav diagram. 41.6657 FC V-1.54.10² 9.d (= 75 radius = 150 1.2 m 59m/ radiusis 54m T 3.6 kmph tmps 39 16. A ball of mass 4.0 kg is attached to the end of a 1.2 m long string and whirled around as shown at a velocity of 3.4 m/s. If the ball is rotated in a horizontal circle what angle does the string make with the horizontal? 0 r R 3g r= 2 V FTsino 2 Fg 41.66/2 3x9.8 FT F cose

You stand on the seat of a chair and then hop off. (a) During the time you are in flight down to the floor, the Earth moves toward you with what acceleration? Model the Earth as a perfectly solid object. (Assume your mass is 50.0 kg.) 8.1939x10^-23 m/s2 Explain your logic. (b) The Earth moves toward you through what distance? (Assume the seat is 49.5 cm high.) 1.3020x10^-23 m