JAMB and WAEC Physics questions

829 questions with answers and explanations. Tap an option to check yourself.

All JAMB WAEC

Question 681· Simple machines· WAEC
An inclined plane is 5 m long and 1 m high. Its velocity ratio is
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Answer: A. 5
Explanation and discussion
Question 682· Simple machines· JAMB
A pulley system with velocity ratio 4 lifts a load of 200 N with an effort of 80 N. Find its efficiency.
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Answer: D. 62.5%
Explanation and discussion
Question 683· Simple machines· WAEC
A machine has a mechanical advantage of 4 and a velocity ratio of 5. Find its efficiency.
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Answer: B. 80%
Explanation and discussion
Question 684· Simple machines· WAEC
A screw jack has a pitch of 0.5 cm and its handle turns in a circle of radius 35 cm. Find the velocity ratio. [π = 22/7]
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Answer: C. 440
Explanation and discussion
Question 685· Simple machines· WAEC
A pulley system lifts a 600 N load with an effort of 200 N. The mechanical advantage is
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Answer: C. 3
Explanation and discussion
Question 686· Simple machines· JAMB
A block and tackle with four pulleys has a velocity ratio of
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Answer: A. 4
Explanation and discussion
Question 687· Simple machines· WAEC
In a pulley system the load is supported by 4 strands of rope. What is the velocity ratio?
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Answer: A. 4
Explanation and discussion
Question 688· Simple machines· WAEC
A pulley system lifts a load of 600 N with an effort of 200 N. Its mechanical advantage is
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Answer: B. 3
Explanation and discussion
Question 689· Simple machines· JAMB
A machine lifts a load of 600 N with an effort of 200 N. Find its mechanical advantage.
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Answer: C. 3
Explanation and discussion
Question 690· Simple machines· JAMB
A screw jack has a pitch of 0.5 cm and a handle of length 35 cm. Find its velocity ratio. (Take π = 22/7.)
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Answer: C. 440
Explanation and discussion
Question 691· Simple machines· WAEC
A machine of velocity ratio 5 lifts a load of 400 N with an effort of 100 N. Find its efficiency.
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Answer: A. 80%
Explanation and discussion
Question 692· Simple machines· JAMB
A wheelbarrow is a lever of the
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Answer: A. second class, with the load between the effort and the fulcrum
Explanation and discussion
Question 693· Simple machines· JAMB
A third-class lever is one in which
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Answer: B. the effort is between the fulcrum and the load
Explanation and discussion
Question 694· Simple machines· JAMB
An inclined plane is 5 m long and raises a load through a height of 1 m. Find its velocity ratio.
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Answer: B. 5
Explanation and discussion
Question 695· Simple machines· JAMB
An inclined plane 5 m long raises a load through a height of 1 m. Its velocity ratio is
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Answer: B. 5
Explanation and discussion
Question 696· Simple machines· JAMB
The efficiency of a real machine is always less than 100% because
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Answer: B. some work is wasted in overcoming friction
Explanation and discussion
Question 697· Simple machines· JAMB
A machine with velocity ratio 5 has an efficiency of 80%. Its mechanical advantage is:
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Answer: C. 4
Explanation and discussion
Question 698· Simple machines· WAEC
A machine has a velocity ratio of 5 and an efficiency of 80%. Its mechanical advantage is
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Answer: B. 4
Explanation and discussion
Question 699· Simple machines· JAMB
A lever has an effort arm of 60 cm and a load arm of 20 cm. Find its velocity ratio.
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Answer: B. 3
Explanation and discussion
Question 700· Simple machines· WAEC
In a first-class lever, the fulcrum is
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Answer: D. between the effort and the load
Explanation and discussion

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JAMB and WAEC Physics questions

An inclined plane is 5 m long and 1 m high. Its velocity ratio is

A pulley system with velocity ratio 4 lifts a load of 200 N with an effort of 80 N. Find its efficiency.

A machine has a mechanical advantage of 4 and a velocity ratio of 5. Find its efficiency.

A screw jack has a pitch of 0.5 cm and its handle turns in a circle of radius 35 cm. Find the velocity ratio. [π = 22/7]

A pulley system lifts a 600 N load with an effort of 200 N. The mechanical advantage is

A block and tackle with four pulleys has a velocity ratio of

In a pulley system the load is supported by 4 strands of rope. What is the velocity ratio?

A pulley system lifts a load of 600 N with an effort of 200 N. Its mechanical advantage is

A machine lifts a load of 600 N with an effort of 200 N. Find its mechanical advantage.

A screw jack has a pitch of 0.5 cm and a handle of length 35 cm. Find its velocity ratio. (Take π = 22/7.)

A machine of velocity ratio 5 lifts a load of 400 N with an effort of 100 N. Find its efficiency.

A wheelbarrow is a lever of the

A third-class lever is one in which

An inclined plane is 5 m long and raises a load through a height of 1 m. Find its velocity ratio.

An inclined plane 5 m long raises a load through a height of 1 m. Its velocity ratio is

The efficiency of a real machine is always less than 100% because

A machine with velocity ratio 5 has an efficiency of 80%. Its mechanical advantage is:

A machine has a velocity ratio of 5 and an efficiency of 80%. Its mechanical advantage is

A lever has an effort arm of 60 cm and a load arm of 20 cm. Find its velocity ratio.

In a first-class lever, the fulcrum is