Final
none of the above
A 0.5-kg blob of clay moving at 2.0 m/s slams into a 4.0-kg blob of clay at rest. The speed of the two blobs stuck together after colliding is about
10 times as much force on the heavier block
A 10-N block and a 1-N block lie on a horizontal frictionless table. To push them with equal acceleration, we would have to push with
2 m/s
A 10-kg block is pushed across a friction-free horizontal surface with a horizontal force of 20 N. The acceleration of the block is
1 m/s
A 10-kg block is pushed across a horizontal surface with a horizontal force of 20 N against a friction force of 10 N. The acceleration of the block is
2000 N
A 1000-kg car moving at 10 m/s that brakes to a stop in 5 s has an average braking force of
the same as its initial speed
A ball is thrown upwards and caught when it returns. Neglecting air resistance, the speed with which it is caught is
8.0 N
A boxer punches a sheet of paper in midair from rest to a speed of 40 m/s in 0.05 s. If the mass of the paper is 0.01 kg, the force of the punch on the paper is
no horizontal forces act on it
A projectile is fired horizontally. With no air resistance it maintains its horizontal component of velocity because
50 m/s
A projectile is launched straight upward at 50 m/s. If air resistance is negligible, its speed upon returning to its starting point is
more the gravitational force between them
According to Newton, the closer gravitationally interacting objects are to each other, the
less the gravitational force between them
According to Newton, the greater the distance between gravitationally interacting objects, the
none of the above. (20 m/s)
At the end of two seconds of free fall, an object released from rest will have a speed of
one; the force due to gravity
How many forces act on an upwardly tossed coin when it gets to the top of its path?
at rest, moving at constant nonzero velocity, in mechanical equilibrium.
If a non-rotating object has no acceleration, then we can say for certain that it is
acceleration
If the mass of an object does not change, a constant net force on the object produces constant
decrease
If the radius of the Earth somehow increased with no change in mass, your weight would
20 m/s
If you toss a ball straight upward at 40 m/s with no air resistance, 6 seconds later its speed is
weight
Inside a freely falling elevator you would experience no
exactly below the midpoint of the ceiling
Inside the interior of a truck that moves at constant velocity is a package that drops from the midpoint of the ceiling. The package hits the floor
is only the force due to gravity, always directed downward
Neglecting air resistance, after a ball leaves your hand when you toss it upward, the force on it
5 m/s
One-half second after starting from rest, a freely falling object will have a speed of about
10 N
Place a book that weighs 10 N on a horizontal surface and the support force on the book is
The same as before
Recoil is noticeable if we throw a heavy ball while standing on a skateboard. If instead we go through the throwing motion but hold onto the ball, without friction effects our net recoil will be
10 N
The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is
solids, liquids and gasses
The resistive force of friction occurs for
decreases
When bullets are fired from an airplane in the forward direction of motion, the momentum of the airplane
decrease by one-quarter
When the distance between two stars doubles, the force between them
the left
When you push your desk to the right, friction on the desk acts toward
add to equal your weight
When you stand at rest on a pair of bathroom scales, the readings on the scales will always
downward and constant
When you toss a coin straight up, it moves upward, turns around, and drops. During this time the acceleration of the coin is
