Unit 2 - Chapter 09 - Introduction to Basic Mechanics

2 1/2 x M x V is the equation for __________ energy. a) Potential b) Kinetic c) Maximum d) Minimum e) Basic

b

Attraction to the centre of the earth is called: a) centrifugal force b) gravity c) mass d) friction e) distance

b

Force acting in a direction at right angles to a surface, divided by the surface area, is defined as: a) acceleration b) pressure c) weight d) surface area e) friction

b

Mass may be measured in a) kJ b) kg c) Kelvin d) kJ/kg e) N/m

b

The unit of measure of work as used in the SI system is a) Newtons b) Joules c) kilowatts d) foot pounds e) Joule metres

b

__________ energy is the ability of a body to do work due to its motion. a) Potential b) Kinetic c) Maximum d) Minimum e) Basic

b

m/s is the SI unit for: a) acceleration b) velocity c) force d) mass e) weight

b

Six kg would be a measure of an object's: a) weight b) volume c) mass d) length e) time

c

The SI unit for pressure is a) kN b) kNm c) kPa d) kN/m 3 e) kN/m

c

The rate of change of velocity is: a) mass b) force c) acceleration d) weight e) displacement

c

The unit of force used in the SI system is the a) kilogram b) Joule c) Newton d) Watt e) Newton metre

c

Which of the following is an example of a static body? a) a body that is accelerating b) a body that is decelerating c) a rigid body that is at rest d) a body that is moving at a uniform velocity along a straight line e) a body colliding with another body and deflecting in a new direction

c

A force of 120 kN is exerted uniformly over an area of 0.2 square metres. What is the pressure? a) 24 kPa b) 240 kPa c) 60 kPa d) 600 kPa e) 6 kPa

d

A mass of 400 kg is moved a horizontal distance of 30 m due to a force of 300 kN. The amount of work done is a) 9,000 J b) 12,000 J c) 12,000 kJ d) 9,000 kJ e) 3,000 kJ

d

Any action on a body which tends to change its size, shape or its state of motion is defined as: a) displacement b) acceleration c) volume d) force e) mass

d

If a force of 200 kN is moved a distance of 15 m in 15 seconds, what power is developed? a) 3,000 kW b) 1,500 kW c) 1,000 kW d) 200 kW e) 150 kW

d

The SI unit for weight is a) kg b) lb c) kip d) Newton e) kg m

d

The ability to do work due to an object's motion is defined as: a) power b) potential energy c) force d) kinetic energy e) weight

d

What is the force of gravity exerted on a person whose mass is 75 kg? a) 7.5 N b) 75 J c) 165 N d) 735.75 N e) 750 N

d

Which of the following examples is not an example of a dynamic body? a) a body that is accelerating b) a body that is decelerating c) a body that is orbiting at a constant velocity around a planet d) a body moving at a uniform velocity along a straight line e) a body colliding with another body and deflecting in a new direction

d

Which of the following statements is true if a person pushes with a force of 300 N on a rock and the rock does not move? a) 300 N of work was done b) 300 J of work was done c) 150 J of work was done d) no work was done e) 0.3 J of work was done

d

Rate of doing work is defined as: a) any energy b) kinetic energy c) potential energy d) work e) power

e

The SI unit for mass is: 2 a) m/s b) m c) N d) J e) kg

e

The change of position (in metres) per unit is a) acceleration b) displacement c) volume d) force e) velocity

e

The unit of measure of energy used in the SI systems is a) work b) torque c) kilowatt d) Newton e) Joule

e

What is the force of gravity exerted on an object having a mass of 5 tonnes? a) 4.905 N b) 49.05 N c) 490.50 N d) 490.50 kg e) 49,050 N

e

The unit of measure of power used in the SI system is a) Newtons b) Joules c) kilowatts d) work e) Joules/Newton

c

A mass of 400 kg is moved a horizontal distance of 20 m due to a force of 500 kN. The amount of work done is a) 8,000 J b) 10,000 J c) 1,000 kJ d) 8,000 kJ e) 10,000 kJ

e

A mass of 600 kg is moved a horizontal distance of 40 m due to a force of 400 N. The amount of work done is a) 16,000 J b) 24,000 J c) 24,000 kJ d) 1,600 MJ e) 160 MJ

a

In the SI system, the unit of force is the a) newton b) MJ c) kg force d) work done in J/s e) Nm

a

M x G x H is the equation for __________ energy. a) Potential b) Kinetic c) Maximum d) Minimum e) Basic

a

The unit of acceleration in the SI system is 2 a) m/s b) m/s 2 c) m /s d) km/s e) m/h

a

__________ energy is the ability of a body to do work by virtue of its position. a) Potential b) Kinetic c) Maximum d) Minimum e) Basic

a