Physics Rotational Mechanics Level: High School
Circular Motion
A 0.68 kg mass is attached to the end of a 0.80 m long string . The mass is whirled in a horizontal circular path . If the maximum tension that the string can withstand is 200 , what is the maximum speed of the mass (in m/s ) if the string is not to break ?a) 6.5
b) 8.7
c) 1.5
d) 15.3
e) 20.4
Physics Kinematics Level: High School
Projectiles
A football is kicked for a field goal attempt and travels in a parabolic trajectory . You should ignore air resistance . When the football reaches its maximum height , which of the following statement is / are true ?a) The magnitude of the vertical acceleration of the football is less than g , but not zero .
b) The speed of the football is equal to its initial speed .
c) The horizontal speed of the football is the same for its entire flight .
d) The magnitude of the horizontal acceleration is g .
e) The net force on the football is vertically downward
Physics Force & Laws Of Motion Level: High School
Friction
A large block of mass M = 7.3 kg is on top of a rough table and is connected by a massless string over a pulley to a smaller hanging mass m = 2.8 kg as shown in the figure at “click here” . what is the minimum coefficient of static friction on the surface of the table such that the system remains at rest and does not slip ?a) 0.163
b) 0.217
c) 0.288
d) 0.384
e) .0510
Physics Force & Laws Of Motion Level: High School
Tension in a String
An object of mass m is hanging by a string from the roof of an elevator . The elevator may or may not be in motion . depending on the statements below . You are asked to determine the magnitude of the tension in the string . Which of the following statement is/are true ?a) If the elevator is moving up with increasing speed , the tension is less than mg .
b) If the elevator is at rest , the tension is less than mg .
c) If the elevator is moving up with decreasing speed , the tension is greater than mg .
d) If the elevator is in free fall ,the tension is zero .
Physics Kinematics Level: High School
Projectile Motion
A ball thrown horizontally from a point 25 m above the ground strikes the ground after traveling horizontally for a distance of 19 m . with what speed (in m/s ) was it , thrown ?a) 5.3
b) 6.1
c) 8.4
d) 9.8
Physics Kinematics Level: High School
One dimensional
A car accelerates from rest at a constant rate for 210 m , reaching a final speed of 25.4 m/s . How many seconds did it take the car to reach this speed ?a) 14.1
b) 16.5
c) 19.3
d) 22.6
e) 26.5
Physics Properties Of Matter Level: High School
Pressure
What is the height in cm of the column of mercury barometer when the atmospheric pressure at a certain location is 1 atm ? The density of mercury is 13.55 g/cm3 .73.7 cm
76.1 cm
77.6 cm
75.3 cm
Physics Properties Of Matter Level: High School
Fluids
Which phase (state) of matter has a fixed volume and takes the shape of its container ?Plasma
Gas
Liquid
Solid
Physics Properties Of Matter Level: High School
Pascal’s Law
What force must be applied to a small cylinder piston with a diameter of 0.32 m to lift a car weighing 12,000 N that is supported by the piston in a large cylinder that has a diameter of 1.4 m ? Assume that there is an enclosed chamber in common between the two pistons and that the chamber is filled with hydraulic oil .2740 N
4800 N
2740 N
627 N
Physics Properties Of Matter Level: High School
Archimedes’s Principle
A spherical shaped hollow steel shell , with a radius of 2.5 m , containing some instruments , is lowered by a cable into a lake . The shell with its contents weighs 7.2 x 105 N on the deck of the ship from which it is being lowered . What is the tension in the cable when the sphere is completely immersed in the water ?7.9 x 104 N
2.9 x 104 N
7.2 x 102 N
1.8 kg
Physics Properties Of Matter Level: High School
Bernoulli’s Theorem
During level airplane flight at a constant velocity , the pressure created by air flowing over the curved upper surface of the wing compared to the pressure created by air flowing along the flat underside of the wing is ?Insufficient data
The same
More less
Physics Rotational Mechanics Level: High School
Conservation
A hoop of radius 0.5 m and a mass of 0.2 kg is released from rest and allowed to roll down an inclined plane . How fast is it moving after dropping from a vertical distance of 3 m ?2.2 m / s
3.8 m / s
7.7 m / s
5.4 m / s
Physics Rotational Mechanics Level: High School
Conservation of Rotational Equilibrium
A force is applied to the end of a 2 ft long uniform board weighing 50 lb , in order to keep it horizontal . while it pushes against a wall at the left . If the angle the force makes with the board is 30 degrees in the direction . What is the magnitude of the force ?100 lb
28.9 lb
57.7 lb
50 lb
Physics Rotational Mechanics Level: High School
Conservation of Angular Momentum
A diver can change her rate of rotation in the air by “lucking” her head in and bending her knees Let’s assume that when she is stretched out straight she is rotating at 1 revolution per second . Now she goes into the “tuck and bend” , effectively shortening the length of her body by half . what will her rate of rotation be now ?4 Hz
5 Hz
Physics Rotational Mechanics Level: High School
Rotational Kinematics
A wheel with a mass of inertia of 8.0 kg-m2 and a rotational kinetic energy of 155 Joules requires what torque to bring it to rest in 4.0 s ?-16 N m
16 N m
- 12 N m
12 N m
