Browse topic-based General Science practice sets.
2333 practice sets · Page 107 of 117
Applying a force to an object perpendicular to its direction of motion will cause the object to
change speed but not direction
change direction but not speed
change the magnitude of its acceleration
not change its speed or direction
An object moves in a circle with a period of 0.025 hours. What is its frequency in Hz?
90 Hz
263 Hz
0.1 Hz
0.01 Hz
An airplane is taking a turn in a horizontal plane
its remains horizontal
it inclines inward
it inclines outward
its wings become vertical
After closing a deal with a client, Kent leans back in his swivel chair and spins around with a frequency of 0.8 Hz. What is the period of Kents spin?
0.8 s
2 Hz
1.25 s
1 Hz
A tin can whirled on the end of a string moves ina circle because
once the can starts moving, that is its natural tendency.
there is a force on the can pulling it outward.
there is an inward force acting on the can.
the can continually pulls on the string.
A stone is tied to one end of a string. Holding the other end, the string is whirled in a horizontal plane with progressively increasing speed. It breaks at some speed because
The required centripetal force is greater than the tension sustained by the string.
The required centripetal force is less than the tension in the string.
The centripetal force is greater than the weight of the stone.
Gravitational forces of the earth are greater than the tension in the string.
A small car is being driven in a circular path at constant speed on a horizontal surface. What is the direction of the frictional force that keeps the car from skidding as it travels along this path?
in the same direction as the velocity of the car
toward the center of the circle
outward from the center of the circle
opposite the direction of the velocity of the car
A satellite moving in a circular orbit around Earth and maintaining a constant speed will experience a
net gravitational force towards Earth.
changing acceleration away from Earth.
net acceleration away from Earth.
changing gravitational force towards Earth.
A rock attached to a string swings in a vertical circle. At the highest point,
only one force acts on the rock.
two forces act on the rock and their resultant is zero.
two forces act on the rock and their resultant is not zero.
no forces act on the rock.
A particle is performing a U.C.M. Which is the wrong statement regarding its motion?
The acceleration vector is tangential to the circle
The acceleration vector is directed towards the center of the circle
The velocity and acceleration vectors are perpendicular to each other
The velocity vector is tangential to the circle
A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle? The motion takes place in a plane. It follows that
its acceleration is constant
its motion is linear
its motion is circular
its velocity is constant
A ladybug rests on the bottom of a tin can that is being whirled horizontally on the end of a string. Since the ladybug, like the can, moves in a circle, there must be a force on it. What exerts this force?
The string
There is no force acting on it.
The can
Gravity
A communication satellite is in a circular orbit around Earth. If the speed of the satellite is constant, the force acting on the satellite
is decreasing.
points toward the center of the Earth at all times.
points in the direction that the satellite is moving.
is zero.
A car travels in a circle with constant speed. The net force on the car
is directed forward, in the direction of travel.
is directed toward the center of the curve.
none of the above
is zero because the car is not accelerating.
A car sometimes overturns while taking a turn. When it overturns, it is
The outer wheel which leaves the ground first
both the wheel leave the ground simultaneously
Either inner wheel or the outer wheel leaves the ground
The inner wheel which leaves the ground first
A car is making a turn at speed v. The radius of the turn is r and the centripetal force on the car is F. If the car rounds the same curve at speed 2v, the required centripetal force is
F
2F
4F
1/2 F
A body of mass m moves in a horizontal circle of radius r at constant speed v for one complete revolution. Which of the following statements is incorrect?
The work done by the centripetal force is 2 pi m v2.
The change in linear momentum of the body is zero.
The total energy of the body is constant.
The angular velocity of body is directed perpendicular to the plane of circular motion.
A body is traveling in a circle at a constant speed. It
has no acceleration
has an inward acceleration
has an outward radial acceleration
has a constant velocity
A body is moving along a circular path with variable speed, it has
A tangential acceleration
Zero acceleration
Both radical and tangential acceleration
A radical acceleration
The aquatic animal whose skeleton is made entirely by cartilages is the
whale
dolphin
shark
seahorse
