Assignment:
Part 1
QUESTION 1 A car uniformly decelerates at a rate of -5.00 m/s2. How far does the car travel after 1.50 seconds if it initially was moving at a speed of 25.0 m/s?
A. d. 28.1 m
B. a. 25.0 m
C. c. 31.9 m
D. b. 37.5 m
QUESTION 2 A cannonball is fired horizontally with an initial velocity of 655 m/s from the end of a cliff 725 m high. How far in the x direction does the cannonball in the air before it hits the ground?
A. c. 7960 m
B. d. 9540 m
C. a. 7884 m
D. b. 5670 m
QUESTION 3 A block is at the top of a ramp that is 4.5 m above a table. If the block slides without friction, how fast is it going at the bottom of the ramp?
A. a. 9.4 m/s
B. c. 0.0 m/s
C. d. 3.6 m/s
D. b. 4.5 m/s
QUESTION 4 The international space station orbits the Earth at an altitude of about 250 km. What is the acceleration due to gravity at that height above the ground? The mass of the Earth is 5.98 x 1024 kg and the radius of the Earth is 6371 km.
A. c. 9098710 m/s5
B. d. 9.10 m/s2
C. a. 9.8 m/s5
D. b. 0 m/s5
QUESTION 5 A 25 kg is acted on by a 45 N horizontal force. If the box accelerates at a rate of .75 m/s2, what is the coefficient of kinetic friction between the box and the table?
A. d. 1.05
B. a. 0.25
C. c. 0.55
D. b. 0.11
QUESTION 6 Three forces pull on a block, the first is 65 N and in the positive x direction. The second is 65 N in the negative x direction and the third is 45 N and is 90 degrees from the first two forces in the positive y direction. What can you say about the resultant force?
A. c. The resultant force is 45 N and in the negative y direction.
B. d. The resultant force is 65 N and in the negative y direction.
C. b. The resultant force is 45 N and in the positive y direction.
D. a. The resultant force is zero.
QUESTION 7 A subatomic particle with mass m initially at rest suddenly decays. If one of the resultant particles with mass 0.40 m of mass leaves with a velocity of 5.5 x 105m/s, what is the velocity of the other particle created?
A. 6.0 x 105 m/s
B. 3.7 x 105 m/s
C. 3.3 x 105 m/s
D. 2.5 x 105m/s
QUESTION 8 A 7.93 kg box is pulled along a horizontal surface by a force FP of 84.0 N applied at a 47.0º angle. If the coefficient of kinetic friction is 0.35, what is the acceleration of the box?
Part 2
Question 1 If a car horn honking that is 450 m is heard 1.3 seconds after it goes off, what is the temperature in degrees Celsius?
A. d. 12 °C
B. c. 56 °C
C. b. 34 °C
D. a. 25 °C
Question 2 A 0.300 kg piece of metal is heated to 88°C and placed in a copper calorimeter with mass 0.150 kg which contains 0.500 L of water that are both initially at 12.6°C. Over a short period of time the mixture comes to an equilibrium temperature of 22.5°C, what is the specific heat of the metal?
A. c. 3400 J/(kg · °C)
B. d. 1250 J/(kg · °C)
C. a. 1084 J/(kg · °C)
D. b. 1500 J/(kg · °C)
Question 3 Using the standard form of a wave x = A cos(ωt), for this wave: 2.5 cos(6.0 t) please determine the following with the correct units:
a. The amplitude.
b. The frequency.
c. The maximum and minimum speed
d. The maximum acceleration
Question 4 A CD with a diameter of 12.5 cm goes from rest to a tangential velocity of 5.6 m/s. If it does this in 2.5 seconds, what is its angular acceleration?
A. 36 rad/s2
B. 16 rad/s2
C. 24 rad/s2
D. 18 rad/s2
Question 5 A piece of gold with a mass of 5.50 kg and density of 19300 kg/m3 is suspended from a string and then totally immersed in a beaker of water. Using density of water is 1000 kg/m3.
a) Determine the volume of the piece of gold.
b) Determine buoyant force on the gold when it is submersed.
Question 6 An object has a weight of 400 N when it is dry. When it is completely submerged in water is has a weight of 150 N. What is the density of the material is the density of water is 1000 kg/m3?
A. d. 1600 kg/m3
B. c. 1200 kg/m3
C. a. 2300 kg/m3
D. b. 4500 kg/m3
Question 7 4.50 moles of an ideal gas is at 560K. Is the gas undergoes an adiabatic compression and 3750 J of work is done on the gas, what is the final temperature of the gas?
A. d. 977 K
B. c. 2590 K
C. b. 572 K
D. a. 627 K
Question 8 A gas is taken through the cycle illustrated here. During one cycle, how much work is done by an engine operating on this cycle?
A. 2PV
B. 3PV
C. PV
D. 4PV