Understanding Acceleration Automobile reviews often cite a vehicle's "0 to 60 time," or the time it takes for a car to go from rest to 60 mph. For example, a "0 to 60 time" of under 5 seconds is considered fast. (For a list of 0-60 times, see http://www.albeedigital.com/supercoupe/articles/0-60times.html.) a. What is the a
A particle moves along a circular path having a radius of 2.0 meters. At an instant when the speed of the particle is equal to 3.0 m/s and changing at the rate of 5.0 m/s2, what is the magnitude of the total acceleration of the particle? a) 9.5 m/s2 b) 6.0 m/s2 c) 5.4 m/s2 d) 6.7 m/s2 e) 4.5 m/s2
A jet fighter can withstand a max acceleration of 9g's; The plane is pointed vertically downward at Mach 3 and will be pulled from the dive in a circular manuver (befoe crashing). a. Where does max acceleration occur ? b. What is the minimum radius the pilot can take? Please show all details.
(See attached file for full problem description with diagrams) 1. If an object is moving at a constant velocity, then we can assert that: a. there must be a force in the direction of the velocity b. there must be no force in the direction of the velocity c. there must be no net force Justify your answer! 2. To tight
A 10-g particle is undergoing simple harmonic motion with an amplitude of 2.0 x 10^-3 m and a maximum acceleration of magnitude 8.0 x 10^-3 m/s^2. The phase angle is -pi/3 rad. a) Write and equation for the force on the particle as a function of time. b) What is the period of the motion? c) What is the maximum speed of the p
I am having trouble figuring out the velocity and acceleration vectors. I am given the form xi+yJ+zk where for example x(t) is (1-t)cos4 pi t y(t) = (1-t) sin 4 pi t z(t) = (1-t) t is supposed to be between 0 and 1 I know that v(t) is the first deriv. and a(t) is the second deriv. but I am not sure how to procee
This problem set contains 15 multiple choice questions on motion along a straight line. First three questions are typed below. 50. A stone is released from a balloon that is descending at a constant speed of 10 m/s. Neglecting air resistance, after 20 s the speed of the stone is: 51. An object dropped from the window of
Answers are given in attachment, but please set up each problem with the math equations needed and show step by step how to do each problems that involves math to get the answer given. Skip any problems that ask those questions that you have to pick a sentence answer. (See attached file for full problem description) 6. A
Two boxes are seen to accelerate at the same rate when a force F is applied to the first box and 4F is applied to the second box. What is the mass ratio of the boxes?
Sin x = .028 1. Plot instantaneous velocity vs. time on a graph and determine the slope of the line and the value of acceleration. Is my answer for the value of acceleration correct? If not, what is it? 2. By substituting the value of acceleration into a = gsinx, compute the experimental value of the gravitational
1. The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 3.0 rev/s in 7.0 s. At this point the person doing the laundry opens the lid, and a safety switch turns off the washer. The tub slows to rest in 10.0 s. Through how many revolutions does the tub turn during this 17 s interval
(See attached file for full problem description) --- 2. The leg and cast in Figure P4.18 weigh 270 N, with the center of mass as indicated by the blue arrow in the diagram. The counterbalance w1 weighs 135 N. Determine the weight w2 and the angle needed so that no force is exerted on the hip joint by the leg plus cast.
The claim that the acceleration of the falling mass is the same as the tangential acceleration of a point at the lever arm distance from the axis is : a = (r)(alpha), where a is the acceleration of the falling mass, r is the lever arm distance, and alpha is the angular acceleration of the turntable. Why is this claim valid? Use
A person stands on a scale in a moving elevator and her mass is 60.0 kg and the combined mass of the elevator and scale is an additional 815 kg. Starting from rest, the elevator accelerates upward. During the acceleration, the hoisting cable applies a force of 9410 N. What does the scale read during the acceleration?
I wanted some help w/ a vector hypothetical. Say, there's is a wind, coming from the northwest (and going southeast), blowing at 25 to 30 MPH on a vehicle traveling east at 55MPH, say at 30 degree to the vehicle, a positive force on the back and left side of this vehicle. What formula would you use to should this positive force?
A wheel initially rotating at an angular speed of 1.6 rad/s turns through 36 revolutions during the time that it is subject to an angular acceleration of 0.32 rad/s^2. How long did the acceleration last?
A pneumatic high-speed cutter with a 7.50 cm diameter cutting disc is advertised to have a rotation rate of between 5,000 and 18,000 rev/min. A) What is the range of angular speeds in radians? B) What is the range of linear speeds of the edge of the disk? C) What is the average angular acceleration if, starting from rest
What is the average angular acceleration of the bit of a dentist's drill? What is the linear speed of the cutting edge?
A) A dentist's drill turns a 0.75 mm diameter bit at 5.0 x 10^5 rev/min. What is the linear speed of the cutting edge? B) When the drill is first turned on it takes about ¼ of a second to come up to full speed. What is the average angular acceleration of the bit? I believe the answer is A) 20 m/s and B) 2.1 x 10^5 rad/s^2. I
10. A sky diver in free fall travels at a speed modeled by (see equation in attached file) ft per second after t seconds. How long will it take for the skydiver to attain the speed of 60 mph (note: 60 mph = 88 ft/sec)?
The following data was recorded for a motorcycle going down a ramp. (see chart in attached file) Please check data and complete the average acceleration. What is the average acceleration for the total running distance?
The centripetal acceleration at the equator is about 3.4 cm/s^2. Use that information and the length of a day to estimate the radius of the earth.
The centripetal acceleration at the equator is about 3.4 cm/s^2. Use that information and the length of a day to estimate the radius of the earth. Show each step and each formula needed and the final answer.
The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 5.0 rev/s in 8.0 sec. a) What is the average acceleration in radians/sec? b) Through how many revolutions does the tub turn in that time? c) If the lid is opened, the safety switch turns off the washer, and the tub slow
1) A particle moves according to the equation x=10t2, where x is in meters and t is in seconds. Find the average velocity for the time interval from 2.0 second to 2.1 second. A) 41 m/s B) 100 m/s 2) If A = (12i -16j) and B = (-24i + 10j), what is the magnitude of the vector C = (2A - B)? A) 42 B) 22 C) 64 D) 90 3) A
26) A 1200 N uniform boom is supported by a cable; one end of the cable being attached to a wall and the other end to top of the boom. The cable is perpendicular to the boom. One end of the boom is attached to a hing on the ground and is leaning away from the wall at an angle of 65 degrees to the ground. A 2000 N weight hangs f
Please identify all variables used. 1) An engine flywheel initially spinning 2000 rpm has an angular acceleration of -10 rad/s2 as it slows down. How long does it take for the flywheel to turn through 100 revolutions? How long does it take to stop? 2) A 50 kg child stand at the rim of a merry go round with a radius of 2.
There are 5 parts to this question and kindly provide explanation on the derivation of answers. See attached file for full problem description.
A rectangular vessel when full of water takes 20 minutes to be emptied through an orifice at its bottom. How much time will it take to be emptied when half filled with water ?
A car moving at constant velocity and a chasing police car moving with a constant acceleration. Five questions have been answered regarding the relative motion of these two vehicles.
Constant Acceleration Problem A motorist traveling with a constant velocity of 15 m/s passes a school-crossing corner. Just as the motorist passes, a police officer stopped on the corner starts off in pursuit with constant acceleration of 2.5 m/s^2 until her speed is 20 m/s. Then she slows down at a constant rate until she c
Riding a Loop-the-loop. A car in an amusement park ride rolls without friction around the track shown in the figure. It starts from rest at point at a height above the bottom of the loop. Treat the car as a particle. 1. What is the minimum value of (in terms of) such that the car moves around the loop without falling off at t
A car starts from rest and moves along a straight road with a constant acceleration of 2.45 m/s^2. a. What is its velocity after 4 seconds? b. How far does it move from t = 4s to t = 5s?