question
stringclasses 15
values | choices
sequence | answer
class label 4
classes |
|---|---|---|
In the absence of air resistance a ball of mass m is tossed upward to reach a height of 20 m. At the 10-m position half way up the net force on the ball is | [
"2mg",
"mg",
"mg/2",
"mg/4"
] | 1B
|
In a vacuum, an object has no | [
"buoyant force",
"mass",
"weight",
"All of these"
] | 0A
|
In a hydraulic press operation, the output piston cannot | [
"move farther than the input piston",
"exceed the force input",
"exceed the input piston鈥檚 speed",
"produce increased energy"
] | 3D
|
When a spinning system contracts in the absence of an external torque its rotational speed increases and its angular momentum | [
"decreases",
"increases",
"remains unchanged",
"may increase or decrease"
] | 2C
|
A heavy rock and a light rock in free fall (zero air resistance) have the same acceleration. The heavy rock doesn't have a greater acceleration because the | [
"force due to gravity is the same on each.",
"air resistance is always zero in free fall.",
"inertia of both rocks is the same.",
"ratio of force to mass is the same."
] | 3D
|
Light that is not transmitted by opaque materials is | [
"reflected or converted to internal energy in the material.",
"mainly reflected.",
"mainly refracted.",
"transmitted at a lower frequency."
] | 0A
|
Imagine you're standing on the surface of a shrinking planet. If it shrinks to one-tenth its original diameter with no change in mass on the shrunken surface you'd weigh | [
"1/100 as much",
"10 times as much",
"100 times as much",
"1000 times as much"
] | 2C
|
All of the following are electromagnetic waves EXCEPT | [
"microwaves",
"light waves",
"X-rays",
"None is outside the family; all are electromagnetic waves"
] | 3D
|
If the volume of an object were to double, with no change in mass, its density would | [
"halve.",
"double.",
"be the same.",
"None of these."
] | 0A
|
The pressure at the bottom of a pond does NOT depend on the | [
"acceleration due to gravity.",
"water density.",
"depth of the pond.",
"surface area of the pond."
] | 3D
|
Which of these does NOT belong in the family of electromagnetic waves? | [
"Light",
"Sound",
"Radio waves",
"X-rays"
] | 1B
|
A math book and a physics book sitting on a table are tied together with a length of string. With the string taut one book is pushed off the edge of the table. As it falls the other book is dragged horizontally across the table surface. With no friction acceleration of the books is | [
"zero",
"g/2",
"g",
"a value between zero and g"
] | 3D
|
In either a fission event or a fusion event, a quantity that remains unchanged is the | [
"kinetic energy",
"mass",
"number of nucleons",
"binding of nucleons"
] | 2C
|
When you drop a ball from rest it accelerates downward at 9.8 m/s^2. If you instead throw it downward assuming no air resistance its acceleration immediately after leaving your hand is | [
"9.8 m/s2",
"more than 9.8 m/s2",
"less than 9.8 m/s2",
"Cannot say unless the speed of throw is given."
] | 0A
|
The fact that the acceleration of free fall is the same for all masses is explained by Newton鈥檚 | [
"first law",
"second law",
"third law",
"law of action鈥搑eaction"
] | 1B
|
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