1) An object is sliding
down a frictionless incline; the object has:
a) constant speed
b) constant velocity
c) constant acceleration
d) changing acceleration
Simply type the letter in the box like "x", without quotes.
2) The following
frictionless system accelerates at 1.60 m/s2 when released.
What is the tension in the
string during acceleration?
3)
Force F gives mass m1 an acceleration of 4.0 m/s2. The same force F gives
m2 an acceleration of 2.0 m/s2. What acceleration would force F give to
the two masses m1 and m2 if they were glued together?
4) The
4.0 kg block accelerates across a frictionless table at 1.5 m/s2. n Find the
mass of m1.
5)
A cyclist traveling at 10 m/s applies her brakes and stops in 25 m. The graph shows
the magnitude of the braking force versus the distance traveled.
What is the total mass of the bike and cyclist?
6)
A 65.0 kg block is being accelerated along a level surface. The applied force
is 500 N and the friction force is 300 N. What is the coefficient of friction
between the block and the surface?
7)
A 75 kg man stands on a scale while accelerating upwards in an elevator. If
the scale reads 850 N, what is the magnitude of the acceleration of the elevator?
8)
A person pushes a 16 kg lawnmower at constant speed with a force of 80 N directed along
the handle, which is at an angle of 45o to the horizontal.
a) what is the horizontal force of the
lawnmower?
b) what is the normal force exerted vertically upward on the mower by the ground?
c) What is the force required to accelerate it from rest to 1.5 m/s in 2.5 seconds?
|
