Mechanics | Relativity Answers

A pupil hangs a load of 45N from a length of copper wire.The wire extends by 2.5mm and does not exceed the limit of proportionality.The gravitational field strength is 10N/kg.Calculate the mass of the 45N load

A man standing at the peak of Mount Everest tries to jump the 8,820m high mountain. If he screams at the time of his jump, how long is he screaming until he lands on the foot of the mountain? [Assume acceleration due to gravity= 10.0 m/s^2 and neglect friction.]

If a car can accelerate at 4m/sec2, what acceleration can it attain if it is pulling another car of identical mass?

Mr Aslam has a mass of 80 kilograms. His apartment is on the second floor, 600cm up from ground level. How much work does he do against gravity each time he climbs the stairs to his apartment?

The blades on a ceiling fan spin at 60 rotation per minute as shown in the figure below. The fan has a radius of 50cm.Calculate the linear speed of a point at the outer edge of a blade in meter per second.

Two forces act on a book resting on a table, its weight and the support force from the table. Does the force of friction act as well? Justify your answer with an example.

Mr Aslam has a mass of 80 kilograms. His apartment is on the second floor, 600cm up from
ground level. How much work does he do against gravity each time he climbs the stairs to his
apartment?

If a car can accelerate at 4m/sec2, what acceleration can it attain if it is pulling another car of identical mass?

Question. No: 1
If a car can accelerate at 4m/sec2, what acceleration can it attain if it is pulling another car of identical mass?
Question. No: 2
Presume a ship cruises with a constant velocity when the thrust from its engines is a constant 10000N. What is the acceleration of the ship? What is the force of air resistance acting on the ship?
Question. No: 3
Two forces act on a book resting on a table, its weight and the support force from the table. Does the force of friction act as well? Justify your answer with an example.
Question. No: 4
The blades on a ceiling fan spin at 60 rotation per minute as shown in the figure below. The fan has a radius of 50cm.Calculate the linear speed of a point at the outer edge of a blade in meter per second.
Question. No: 5
Mr Aslam has a mass of 80 kilograms. His apartment is on the second floor, 600cm up from ground level. How much work does he do against gravity each time he climbs the stairs to his apartment?

Question. No: 1
If a car can accelerate at 4m/sec2, what acceleration can it attain if it is pulling another car of identical mass?
Question. No: 2
Presume a ship cruises with a constant velocity when the thrust from its engines is a constant 10000N. What is the acceleration of the ship? What is the force of air resistance acting on the ship?
Question. No: 3
Two forces act on a book resting on a table, its weight and the support force from the table. Does the force of friction act as well? Justify your answer with an example.
Question. No: 4
The blades on a ceiling fan spin at 60 rotation per minute as shown in the figure below. The fan has a radius of 50cm.Calculate the linear speed of a point at the outer edge of a blade in meter per second.
Question. No: 5
Mr Aslam has a mass of 80 kilograms. His apartment is on the second floor, 600cm up from ground level. How much work does he do against gravity each time he climbs the stairs to his apartment?