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WorksheetsETS DP014_TRIAL 3
Total questions: 20
Worksheet time: 16mins
Work done by a constant force is
the dot (scalar) product of the force and displacement.
the dot (scalar) product of the force and acceleration.
the dot (scalar) product of the force and time.
the dot (scalar) product of the force and velocity.
Work done on an object is zero when _________________. (more than one answer choice)
F = 0
s = 0
θ° = 0°
θ = 90º
Area under the F - s graph represent the ______________.
power
work done
impulse
momentum
Energy is _______________. (more than one answer choice)
the system’s ability to do work.
cannot be transferred from one form to another but it can be destroyed or created.
can be transferred from one form to another but it cannot be destroyed or created.
stored in a body or system because of its position, shape and state.
The kinetic energy of a body of mass m moving with velocity v is E. If the velocity of the body is increased to 3v, what is the kinetic energy of the body?
2E
3E
6E
9E
A man pulls a sled along a rough horizontal surface by applying a constant force, F at an angle θ above the horizontal. In pulling the sled a horizontal distance d, the work done by the man is ________________.
Fd
Fd cos θ
Fd sin θ
cos θFd
"the energy stored in a body or system because of its position, shape and state".
This statement is best for ________________.
kinetic energy.
elastic potential energy.
gravitational potential energy.
mechanical energy.
Energy from a compressed spring would be an example of ___________________.
kinetic
elastic
gravitational
chemical
Which of the following statements is CORRECT for a particle moving in a horizontal circle with constant speed?
The angular velocity is constant but the linear velocity varies.
Both the linear momentum and kinetic energy is constant.
The speed is constant and the acceleration is zero.
The resultant force is zero and kinetic energy varies.
A mass at the end of a string is set in motion so that it describes a circle in a horizontal plane. Which of the following diagrams shows correctly the resultant force F on the mass?
Centripetal acceleration acts __________ of the circular path.
towards the center
along the circumference
away from the center
perpendicular to the plane
Centripetal acceleration is GREATER when ________________.
the radius of the circular motion is increased.
the linear speed is decreased.
the linear speed is unchanged
the radius of the circular motion is decreased.
In circular motion, the centripetal force is always directed ____________________.
towards the center
tangent to the path
away from the center
opposite to the velocity
What is the force that causes centripetal acceleration when a car goes around a curve?
Friction
Gravity
Normal
Tension
Which activities below are examples of horizontal circular motion? (more than one answer choice)
a car turning a corner
roller coaster
merry go round
Ferris wheel
Which statements below is correct about circular motion? (more than one answer choice)
The motion of an object in a circle with a constant/uniform speed.
The direction of linear velocity, v at every point along the circular path is tangent to the point.
Any object whose change in shape and size is very small when exerted by a large force.
Description of the motion of objects without consideration of what causes the motion.
Why does an object experiencing uniform circular motion have an acceleration?
because it ir changing speed
because it is changing direction
because it is moving n a straight line
because it has mass
The figure shows a mass, m at the end of string moving in a horizontal circle of radius r with a speed v. The string is inclined at an angle θ to the vertical. The tension in the string is T.
Which of the following is the centripetal force?
T sin θ
T cos θ
T sin θ + rmv2
T sin θ − rmv2
