WorksheetsTLevel U7 Mechanical Principles
Total questions: 20
Worksheet time: 2hrs 40mins
A simply supported beam supports a single load at a single point along its length. What is the formula to calculate the support reaction at R1?
R1 = (F x L1) / (L1 + L2)
R1 = (F x L1) / (L2)
R1 = (F x L2) / (L1)
R1 = (F x L2) / (L1 + L2)
The energy possessed by a flywheel because of its rotary motion is an example of:
Braking force
Rotational kinetic energy
Gravity
Tractive effort
A vehicle has a mass of 800kg and is travelling at 1m/s. It collides with a second vehicle, which is stationary. The two become fixed together as a single mass travelling in the same direction as the original vehicle was at 0.4 m/s. Assuming that no energy was lost in the collision, calculate the mass of the second vehicle.
320kg
480kg
1120kg
1200kg
In which of the following force systems do all forces pass through a single point?
Concurrent
Kinetic
Non-concurrent
Coplanar
Calculate the potential energy of a pallet with a mass of 70kg that is sitting on top of a platform 20m high (hint: Gravity = 9.8m/s²).
142.8J
882J
1400J
13 720J
What is acceleration?
Change in the velocity of an object over time, measured in m/s²
Change in the velocity of an object over time, measured in m/s
The motion of an object that is moving very fast
Change in the position of an object over time, measured in m/s
Newton’s first law states … ?
Energy cannot be created or destroyed, just changed between different forms
An object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force
An object is in equilibrium if the forces acting on it are zero
The acceleration of an object produced by a force is proportional to the mass of the object in the direction opposite to the force
You measure a distance of 7m between two markers, and releasing a constant velocity object at one marker, you find it takes 4.2 seconds to travel between the markers. What is the speed of the object?
29m/s
1.67m/s
0.6m/s
7m/s
Which of the following statements is true for a simply supported beam with uniformly distributed loading?
The maximum value of the shear force is at the midpoint of the beam
The bending moment diagram will be a sloping straight line passing through the midpoint
The maximum value of the bending moment will be experienced at the two ends of the beam
The reaction forces at each end of the beam will be the same
A forklift truck with a mass of 800kg is travelling with a velocity of 40m/s. Calculate its kinetic energy.
32kJ
313.6kJ
640kJ
1.28MJ
Which of the following is an example of a contact force?
Magnetic
Electrostatic
Friction
Gravitational
What is Newton’s second law in equation form?
F = ma
td
Force of friction = ma
p = mv
An object of mass 60kg is raised by a height of 15m. Calculate the change in the potential energy of the object (additional information: g = 9.81 m/s²).
588.6J
900J
2887J
8829J
Which statement about frictional resistance is correct?
It is a non-contact force
It works in the same direction as the motion of the object
It is the same irrespective of the materials used to make the surfaces
Types include sliding, rolling and static friction
A 50N force is applied to a shopping trolley, causing it to move a distance of 10m. How much work is done in this process?
500J
5J
0.2J
250J
In which units is power measured?
Joules
Newtons
Newton metres
Watts
A vehicle of mass 1,500kg is initially travelling at 20m/s. Calculate the braking force required for the car to come to a complete stop in 15m.
10kN
20kN
30kN
45kN
In an experiment where a mass falls under gravity and turns a flywheel to which it is connected, what kind of energy exists in the system at the start?
Kinetic energy
Elastic potential energy
Gravitational potential energy
Rotational energy
Which statement about tractive effort is correct?
It reduces as the mass of the wheel increases
It is not affected by gravity
It increases as the friction coefficient between the wheel and surface increases
It is a rotary force
What is the formula for the kinetic energy of an object?
KE = mgh
KE = ½ mv²
KE = mu
KE = F/A
