Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
28 Cards in this Set
- Front
- Back
|
On earth, objects A and B have the same mass and weight. If object B is moved to the moon, which of the following statements is true? A. Both objects have the same weight, but object A now has the greater mass B. Both objects have the same weight, But object A now has the greater mass C. Both objects still have the same mass and weight |
A. The drivers body will continue to move forward due to inertia.
|
|
|
Which example describes an object in equilibrium? A. a parachutist after he jumps from an airplane B. A person sitting in a still chair C. A soccer ball when its kicked |
B. A person sitting in a still chair |
|
|
Which of the following forces causes oppositely charged ions to attact? A. Nuclear B. Electromagnetic C. Tension |
B. Electromagnetic |
|
|
An object with a weight of 32 N on the moon is brought to earth. If the acceleration due to gravity on the moon is 1.6 m/s^2, what is the weight of the object on earth? A. 1.96 N B. 19.6 N C. 196 N |
C. 196 N |
|
|
In Figure 3.2 if mass M is much greater than mass m, what direction do both masses move? A. Mass M will move down, and mass m will move up. B. Mass M will move up, and mass m will move down C. Neither mass will move, the system is in equilibrium |
A. Mass M will move down, and mass m will move up. |
|
|
If a block is sliding down an inclined plane, in what direction will the friction vector point? A. directly into (perpendicular to) the plane B. Down and parallel to plane C. Up and parallel to plane |
C. Up and parallel to the plane ( because if the block is moving down the plane, the force of the friction points up the plane.) |
|
|
which object will experience the largest buoyant force when fully submerged? A. A golf ball B. A baseball C. A basketball |
C. A basketball (a basketball has more surface are thus is more likely to float) |
|
|
Which object has the highest moment of inertia? Assume all objects have the same mass. A. A solid disk with a radius of 5 cm B. A solid disk with a radius of 10 cm C. A hollow disk with a radius of 10 cm |
C. A hollow disk with a radius of 10 cm (bc this object has identical mass to the other objects, but all the mass is located at a larger distance from the axis of rotation than the other objects.) |
|
|
Which situation requires the most work done on a car? A. Pushing the car, but it does not move. B. Towing the car up a steep hill for 100 meters. C. pushing the car 5 meters across a parking lot |
B. Towing the car up a steep hill for 100 meters. |
|
|
Which of the following is not a unit of energy? A. Joule B. Kilowatt hour C. Newton |
C. Newton |
|
|
A constant external force of 10 N is applied to an object to keep it moving at a constant speed of 10 m/s. Which of the following statements about the object is true? A. No power is used to move the object. B. The external force supplies power to keep the object moving at 10 m/s. C. The object is not accelerating, so no power. |
B. The external force supplies power to keep the object moving at 10 m/s. |
|
|
Modern cars are designed to crumple during a collision. Using the concept of impulse, how does this protect the passengers? A. By decreasing the interaction time, the crumple maximizes the force felt by the passengers. B. By decreasing the interaction time, the crumple minimizes the force felt by the passengers. C. By increasing the interaction time, the crumple minimizes the force felt by the passengers |
C. By increasing the interaction time, the crumple minimizes the force felt by the passengers. |
|
|
A man is sitting in a boat next to a dock and decides to jump from the boat to the dock. The boat is much lighter than the man. Using the conservation of momentum, what will be the most likely result? A. The man will most likely fall into the water. B. The man will reach the dock C. The boat will slam into the dock |
A. The boat will move behind the man at high speed, while the man will move forward at low speed. |
|
|
Which is an example of a first class lever? A. Wheelbarrow B. Scissors C. Tweezers |
B. Scissors |
|
|
Which mechanical advantage is the best for the user? A. 10 B. 5 C. 2 |
A. The highest mechanical advantage is the best for the user |
|
|
What comment about the electric field is true? A. The electric field can turn a proton turn into an electron. B. The electric field gets stronger the farther it is from a charge. C. The electric field always points from positive to negatve charges. |
C. The electric field does point from positive to negative charges |
|
|
What configuration of particles can make an atom? A. Two neutrons B. One proton and one electron C. One neutron and one electron |
B. The proton and electron will attract and create an atomic system (in this case, a hydrogen atom) |
|
|
What best describes the properties of a semiconductor? A. It is an insulator unless dopants are added B. It is a conductor unless dopants are added C. It is half the conucting properties of a conductor |
A. A semiconductor is an insulator whose conducting properties can be altered with dopants. |
|
|
What is the best type of wire to use to get the highest resistance? Assume the material resistivity in the wire is identical. A. Long, thin wire B. Long, thick wire C. Short, Thin wire |
A. Long, thin wire |
|
|
What is the source of electromotive force in a battery ? A. Change in magnetic field B. Mechanical movement C. chemical processes |
C. A battery contains chemicals that produce an electromotive force through chemical reactions |
|
|
Because a crowbar has a fulcrum in the middle of the effort and the resistance, it is an example of a: A. First- class lever B. Second class lever C. Third -class lever |
A. First- class lever B. Second class lever C. Third -class lever |
|
The simple machine shown above is an example of A. A lever B. A pulley C. An inclined plane |
C. Inclined plane |
|
Front (Term) |
A. gear 1 only |
|
Front (Term) |
B. Pully C turns the slowest |
|
Front (Term) |
B. 2 feet |
|
|
Why is it so difficult to hold a beach ball under water? A. The ball is full of air, which is much less dense than water B. The ball expands under water, so it rises faster C. The cool water will cool the air in the ball, making it rise |
A. The ball is full of air, which is much less dense than water B. The ball expands under water, so it rises faster C. The cool water will cool the air in the ball, making it rise |
|
Front (Term) |
A. Person A carries the most weight |
|
|
On earth, objects A and B have the same mass and weight. If object B is moved to the moon, which of the following statements is true? A. Both objects have the same weight, but object A now has the greater mass B. Both objects have the same weight, But object A now has the greater mass C. Both objects still have the same mass and weight |
A. Both objects have the same weight, but object A now has the greater mass |
