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Engineering-mechanics Questions Set 23:

Quiz Mode

A bullet fired from a gun can pierce a target due to its what type of energy?

Mechanical energy

Heat energy

Kinetic energy

Acceleration

Solution:

A ball is projected vertically upwards with a certain velocity u m/s. It takes 30 seconds for its upward journey. The time taken for its downward journey is:

40 s

30 s

20 s

10 s

Solution:

A solid shaft is to transmit a torque of 12 KN⋅mm. If the maximum shear stress is not to exceed 25 MPa, find the minimum diameter of the shaft.

13.47 mm

10.42 mm

0.13 mm

1.34 mm

Solution:

When we pull back the string of a catapult (gulel) to throw a stone, what kind of energy is stored in the stretched string?

Kinetic energy

Potential energy

None of the above

Both kinetic and potential energy

Solution:

A train of weight 1,500,000 N is running on a horizontal track at a constant speed of 8 m/s, overcoming a constant frictional force of 10,000 N. What is the power of the engine driving the train?

80 kW

100 kW

120 kW

200 kW

Solution:

What is Engineering Mechanics?

Study of bodies under motion without considering forces

Application of mechanics to issues involving common engineering aspects

Study of bodies only under rest

Study of bodies only under motion

Solution:

A car is driving at a speed of 10 m/s on a level road. When the brakes are applied, the car skids for 24 m before coming to a stop. Calculate the coefficient of kinetic friction between the road and the tires.

0.322

0.212

0.167

0.275

Solution:

The numbers of joints in two trusses are 3 and 7 respectively. The numbers of members in them are 5 and 11 respectively. Determine the respective types of these two trusses.

Perfect, imperfect

Perfect, perfect

Imperfect, perfect

Imperfect, imperfect

Solution:

The difference between a body acted upon by two force members and a body acted upon by three force members is:

The former is perpendicular and the latter is collinear

The former is parallel and the latter is perpendicular

The former is collinear and the latter is parallel

The former is acting on two points in the body while the latter is acting on three points

Solution:

A block weighing 981 N is resting on a horizontal surface. The coefficient of friction between the block and the horizontal surface is μ = 0.2. A vertical cable attached to the block provides partial support as shown. A man can pull horizontally with a force of 100 N. What will be the tension, T (in N) in the cable if the man is just able to move the block to the right?

348.1

550.1

140.7

481.0

Engineering-mechanics Questions Set 23:

A bullet fired from a gun can pierce a target due to its what type of energy?

Solution:

A ball is projected vertically upwards with a certain velocity u m/s. It takes 30 seconds for its upward journey. The time taken for its downward journey is:

Solution:

A solid shaft is to transmit a torque of 12 KN⋅mm. If the maximum shear stress is not to exceed 25 MPa, find the minimum diameter of the shaft.

Solution:

When we pull back the string of a catapult (gulel) to throw a stone, what kind of energy is stored in the stretched string?

Solution:

A train of weight 1,500,000 N is running on a horizontal track at a constant speed of 8 m/s, overcoming a constant frictional force of 10,000 N. What is the power of the engine driving the train?

Solution:

What is Engineering Mechanics?

Solution:

A car is driving at a speed of 10 m/s on a level road. When the brakes are applied, the car skids for 24 m before coming to a stop. Calculate the coefficient of kinetic friction between the road and the tires.

Solution:

The numbers of joints in two trusses are 3 and 7 respectively. The numbers of members in them are 5 and 11 respectively. Determine the respective types of these two trusses.

Solution:

The difference between a body acted upon by two force members and a body acted upon by three force members is:

Solution:

Solution:

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