Reading...
Play button
Play button
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;
16 Cards in this Set
- Front
- Back
|
An object mobing at constant velocity in an inertial (nonaccelerated) reference frame must:
|
have a zero net force on it
|
|
|
Acceleration is always in the direction:
|
of the net force.
|
|
|
The inertia of a body tends to cause the body to:
|
resist any change in its motion.
|
|
|
When a certain force is applied to a 1 kg mass its acceleration is 5 m/s. When the same force it applied to another object its acceleration is 1/5 as much. The mass of the second object is:
|
5 kg
|
|
|
The block shown moves with constant belocity on a horizontal surface. Two of the forces are shown. A frictional force exerted by the surface is the only other horizontal force acting on the block. The frictional force is:
|
2N, leftward
|
|
|
Equal forces act on isolated bodies A and B. The mass of B is three times that of A. The magnitude of the acceleration of A is:
|
three times that of B.
|
|
|
A care travels east at constant velocity. The net force on the car is:
|
zero.
|
|
|
An object rests on a horizontal frictionless surface. A horizontal force of magnitude F is applied. This force produces an acceleration:
|
always.
|
|
|
A book rests on a table, exerting a downward force on the table. Newton's third law pair to this force is:
|
the force of the table on the book.
|
|
|
A vector in the xy plane has a magnitude of 25 m and and x component of 12 m. The angle it makes with the positive x axis is:
|
61 degrees.
|
|
|
A stone is thrown horizontally and follows the path xyz shown. The direction of the acceleration of the stone at point y is:
|
directly down.
|
|
|
If a satellite moves above Earth's atmosphere in a circular orbit with constant speed, then:
|
its acceleration is toward Earth.
|
|
|
A 5 kg object can move along the x axis. It is subjected to a force in the positive x direction; a graph of the function is shown. Over the time the force is applied the change in the velocity of the object is:
|
.8 m/s
|
|
|
The center of mass of a system of particles remains at the same place if:
|
it is initially at rest and the external forces sum to zero.
|
|
|
A 5 kg cart is moving horizontally at 6 m/s. In order to change its speed to 10 m/s, the net work done on the cart must be:
|
160 J
|
|
|
A rectangular block is moving along a frictionless path when it encounters the circular loop as shown. The block passes points 1, 2, 3, 4, 1 before returning to the horizontal track. At point 3:
|
its speed is a minimum.
|
