Kinematics
A plane has a takeoff speed of 88.3 m/s and requires 1365 m to reach that speed. Determine the acceleration of the plane and the time required to reach this speed.
a = 2.86 m/s/s and t = 30. 8s
Which of these statements represent a vector description? Include all that apply.
1,4,5,7
A 2.50 kg skunk is resting on a table top. What is its weight in Newtons?
w= 25 N
A centripetal force F is keeping body of mass m revolving in a circular orbit or radius r with a speed v. In terms of F, what sized centripetal force would be required if the radius were tripled?
mv^2/3r
A man pushes a vacuum cleaner with a force of 50 N at an angle of 60 degrees below the horizontal. IF the vacuum cleaner moves horizontally along the floor a distance of 6.5m, what is the work done by the man?
162.5 J
An airplane accelerates down a runway at 3.20 m/s2 for 32.8s until it finally lifts off the ground. Determine the distance traveled before takeoff.
d = 1720 m
A vector of magnitude 5 added to a vector of magnitude 8 could not produce a resultant of magnitude...
a. 2
b. 4
c. 7
d. 9
e. 12
a. 2
Consider a 8.0 kg raccoon standing on a frictionless incline of 37 degrees. What is the downhill force on the raccoon.
48.1 N
What coefficient of friction would be required to keep a 1,250 kg car in a 40 meter turn at a speed of 25 m/s?
1.56
A force is pulling a block of mass 5 kg along a rough surface of coefficient of kinetic friction 0.40 at a constant speed of 5 m/s. The work done against friction in 10s is most nearly...?
1000 J
A kangaroo is capable of jumping to a height of 2.62 m. Determine the takeoff speed of the kangaroo.
vi = 7.17 m/s
Consider a boat which travels at a speed of 10 m/s in still water. If the same boat is taken to a 100 m-wide river with an eastward directed current of 5 m/s, determine the time for the boat to reach the opposite shore-line while following the path.
10 seconds
A 1 kg hockey puck traveling with a speed of 45 m/s to the right encounters a frictional force of -2 N. After encountering the frictional force, how far does the puck slide before coming to rest?
506.25 meters
A 0.0005 kg coin is sitting on a rotating turntable at a point 0.10 from the center. The turntable is rotating at a rate of 33 rpm's. (One revolution in T= 1.80 seconds). What is the centripetal force on the coin?
6.125x10^-4 N
A horizontal spring can shoot a 0.35 kg block at a maximum speed of 12 m/s if it is originally compressed a distance of 45 cm. Assume the block is shot horizontally and that the surface the block is on is frictionless. How much energy does the block have after it is shot?
25.2 J
A feather is dropped on the moon from a height of 1.40 meters. The acceleration of gravity on the moon is 1.67 m/s2. Determine the time for the feather to fall to the surface of the moon.
t = 1.29 s
A ball is thrown at an upward angle with a speed of 20 m/s. Which of the following changes as the ball moves through the air?
a. horizontal velocity
b.vertical velocity
c. acceleration
b. vertical velocity
A 10 kg box rests on a horizontal floor. The coefficient of static friction is .30 while the coefficient of kinetic friction is .21 Determine the force of friction acting on the box if a horizontal external force is exerted on it of magnitude 37 N.
21 N
If a car has a mass of 1,200 kg and a coefficient of static friction of 0.55 between the tires and road, with what maximum speed can the car round the curve if the track has a radius of 85m?
21.62 m/s
A sled of mass m traveling with a horizontal speed of 4.0 m/s passes over the edge of a hill of height 1.0m. Ignore friction. The speed of the speed upon reaching the bottom of the hill will be most nearly...?
6.0 m/s
A race car accelerates uniformly from 18.5 m/s to 46.1 m/s in 2.47 seconds. Determine the acceleration of the car and the distance traveled.
a = 11.2 m/s/s and d = 79.8
A zebra jumps horizontally from a 1.2m high rock at a velocity of 2.7 m/s. How far from the base of the rock will it land?
d= 1.32 meters
A block of mass 4.0 kg is given an initial velocity of 15 m/s across a floor. The coefficient of kinetic friction between the block and the floor is .22 The block then decelerates to a stop. How far did the block slide?
51.14 meters
A bucket is revolved in a vertical circle. If the mass of the water in a bucket is 2.5 kg, the radius of the circle is 1.3m, and the speed of revolution is 12 m/s, what force does the bucket exert on the water at the BOTTOM of the loop?
301.92 N
A 326g object is attached to a spring and oscillates back and forth. The total mechanical energy of the mass-spring system is 5.83 J, and the maximum displacement of the object is 23.8 cm. What is the object's maximum speed?
5.9 m/s