Physics Circular Motion Level: Misc Level
A wheel that is rotating at 33.3 rad/s is given an angular acceleration of 2.15 rad/s to power of (exponent). Through what angle has the wheel turned when its angular speed reaches 72.0 rad/s?
a. 83.2 rad
b. 697 rad
c. 66.8 rad
d. 948 rad
Physics Circular Motion Level: Misc Level
An object is moving in a circular path with an angular speed of 1.52 rad/s. How long does it take the object to complete one revolution?
a. 4.13 s
b. 2.07 s
c. 118 s
d. 4.77 s
Mathematics Trigonometry Level: Misc Level
A triangle has angles of 1.02 radians and 0.85 radians. What is the third angle?
a. 1.27 rad
b. 1.13 rad
c. 2.13 rad
d. 4.41 rad
Physics Rotational Mechanics Level: Misc Level
A 60.0- kg man stands at one end of a 20.0- kg uniform 10.0 -m long board. How far from the man is the center of mass of the man - board system?
a. 1.25 m
b. 2.50 m
c. 5.00 m
d. 7.50 m
Physics Force & Laws Of Motion Level: Misc Level
In a collision between two unequal masses, how does the impulse imparted to the smaller mass by the larger mass compare with the impulse imparted to the larger mass by the smaller one?
a. It is larger.
b. It is smaller.
c. They are equal.
d. The answer depends on how fast they are moving.
Physics Kinematics Level: Misc Level
A 0.330 - kg volleyball is thrown vertically downward with a speed of 0.150 m/s. It takes it 0.0655 s to reach the ground. What is the magnitude of its momentum just before it hits the ground?
a. 0.212 kg x m/s
b. 0.262 kg x m/s
c. 0.163 kg m/s
d. 0.0216 kg x m/s
Physics Force & Laws Of Motion Level: Misc Level
A golf club exerts an average force of 1000 N on a 0.045 - kg golf ball which is initially at rest. The club is in contact with the ball for 1.8 ms. What is the speed of the golf ball as it leaves the tee?
a. 35 m/s
b. 40 m/s
c. 45 m/s
d. 50 m/s
Physics Force & Laws Of Motion Level: Misc Level
Two air track carts move along an air track towards each other. Cart A has a mass of 450 g and moves toward the right with a speed of 0.850 m/s and air track B has a mass of 300 g and moves toward the left with a speed of 1.12 m/s. What is the total momentum of the system?
a. 0.047 kg x m/s toward the right.
b. 0.719 kg x m/s toward the right.
c. 0.750 kg x m/s toward the right.
d. 0.750 kg m/s toward the left.
Physics Force & Laws Of Motion Level: Misc Level
A firecracker breaks up into two pieces, one has a mass of 200 g and flies off along the x -axis with a speed of 82.0 m/s and the second has a mass of 300 g and flies off along the y -axis with a speed of 45.0 m/s. What is the total momentum of the two pieces?
a. 361 kg x m/s at 56.3 degrees from the x- axis.
b. 93.5 kg x m/s at 28.8 degrees from the x- axis.
c. 21.2 kg x m/s at 39.5 degrees from the x -axis.
d. 361 kg x m/s at 0.983 degrees from the x- axis.
Physics Work,Power & Energy Level: Misc Level
A snowboarder coasts on a smooth track that rises from one level to another. If the snowboarder s initial speed is 4 m/s, the snowboarder just makes it to the upper level and comes to rest. With a slightly greater initial speed of 5 m/s, the snowboarder is still moving to the right on the upper level. What is the snowboarder s final speed in this case?
a. 1 m/s
b. 2 m/s
c. 3 m/s
d. 4 m/s
Physics Work,Power & Energy Level: Misc Level
What should the height of a slide in a park be so that a child will reach the bottom of the slide with a speed of 15.0 m/s? Use g =10.0 m/s squared:
a. 22.5 m
b. 15.1 m
c. 11.3 m
d. 10.5 m
Physics Work,Power & Energy Level: Misc Level
The ratio of the potential energy to the kinetic energy of an object of mass m at a height of 40 m above ground level is 2:1. What is the speed of the object at that point? Use g = 10 m /s squared:
a. 10 m/s
b. 20 m/s
c. 30 m/s
d. 40 m/s
Physics Work,Power & Energy Level: Misc Level
A mass of 1.0 kg is pushed against a spring with a spring constant of 25 N/m. As a result, the spring is compressed by 20 cm.The mass is then released .What is the amount of potential energy acquired by the spring when it is compressed?
a. 5.0 J
b. 0.20 J
c. 0.50 J
d. 10 J
Physics Work,Power & Energy Level: Misc Level
An object of mass 20 kg is raised vertically through a distance of 8.0 m above ground level.Using g =10 m/s squared what is the potential energy of this object at this position?
a. 160 N/m
b. 160 N/m
c. 1600 N/m
d. 1600 N/m
Physics Work,Power & Energy Level: Misc Level
An object of mass 4.0 kg is moved from a point A to a point C as follows: 0.80 m vertically from A to B, and then 0.60 m horizontally from B to C. What is the amount of work done as the object is moved from point A to C? Use g =10 m/s squared.
a. 1.3 J from A to B and 16 J from B to C.
b. 2.2 J from A to B and 32 J from B to C.
c. 32 J from A to B and 0 J from B to C.
d. 4.0 J from A to B and 16 J from B to C.
