WorksheetsTest - Dynamics & Statics
Total questions: 30
Worksheet time: 8hrs 30mins
What is the direction of tangential velocity at point B, if the ball is rotating clockwise?
up
right
down
left
towards the center
Centripetal acceleration always points
in the direction of the object's motion
in the opposite direction of the object's motion
towards the center of the circle
towards the outside of the circle
To change the motion of an object, inertia must be overcome by a __________ acting on the object.
some forces
Force
resultant force
centrifugal force
The bat flies at a speed of 0.5 m/s in circle of radius 1 m. What is its acceleration?
0.25 ms-2
0.25 ms-1
2 ms-2
2 ms-1
Magnetic and Electrostatic Force are both examples of non-contact forces.
True
False
If the radius of the string is 30 cm long and the stopper makes 5 revolutions per second, what is the tangential velocity of the stopper?
9.4 m/s
6.8 m/s
11.7 m/s
3.5 m/s
What's the centripetal acceleration of an object traveling 2.3 m/s around a circle of diameter 0.6 m?
17.63 m/s
17.63 m/s2
10 m/s2
8.81 m/s2
A concept associated with how hard is it to stop a moving object is called ______
Force
Momentum
Velocity
Inertia
Objects at rest remain at rest and objects traveling at a steady rate in a straight line continue that way until a net force acts on them. This law is called:
Newton's first and second law
Newton's second law
Newton's third law
Law of inertia
Law of conservation of linear momentum
What is the base SI unit of impulse __________.
N/s2
kg m/s
Ns
kg/s
Newton's Second Law can be expressed as
a = Fm
m = Fa
Ft = mv-ma
F = m(v-u)/t
What happens when unbalanced forces act on an object at rest?
the object remains at rest
the object accelerates in an unpredictable direction
the object begins accelerates in the direction of the net force
the object begins moving opposite to the direction of net force
What is Newtons 2nd law of motion?
Force = Mass multiplied by velocity
Weight of cocoyam = Mass of cocoyam multiplied by gravity
For every action there is a equal and opposite re-action.
The law of inertia
Spring constant is measured in
N
N/m
m
Hooke's Law fails when a material reaches its:
breakdown
elastic limit
inelastic limit
fracture stress
When we're talking about a pendulum, what does T stand for?
Tension
period
length
gravity
As a pendulum gets longer, what happens to the period?
doesn't change
decreases
increases
Which of these does not affect the period of a pendulum?
length
gravity
mass
Batman and Robin swing from ropes attached to a large elevated platform. Suppose that they can be treated as a simple pendulum with a length of 16 m. Determine the period for one complete back and forth cycle.
16 s
4 s
8 s
6 s
The initial momentum and final momentum of a closed system remains constant is the law of:
Dissipation of momentum
Conservation of momentum
Destruction of momentum
Rate of change of momentum
Which statement is correct?
All the forces are equal in size.
The resultant force on the beam is in the opposite direction to the resultant turning effect.
The resultant force on the beam is zero and the resultant turning effect on the beam is zero.
The total upward force is twice the total downward force.
Which beams rotate clockwise?
P and Q only
P and R only
Q and R only
P, Q and R
