Tiwari Academy Discussion

Asked: February 13, 2021In: Class-11-Physics

Give an example in which a force does work on a body but fails to change its K.E.

NCERT Solutions for Class 11 Science Work energy and power 4 Important Board Questions Work energy and power NCERT Books for Session 2020-2021 CBSE Board and UP Board 2 Marks Questions

Vanshya

Asked: February 13, 2021In: Class-11-Physics

How high must a body be lifted to gain an amount of P.E. equal to the K.E. it has when moving at speed 20 ms⁻¹. (The value of acceleration due to gravity at a place is 9.8 ms⁻²).

NCERT Solutions for Class 11 Science Work energy and power 4 Important Board Questions Work energy and power NCERT Books for Session 2020-2021 CBSE Board and UP Board 2 Marks Questions

Vanshya

Asked: February 13, 2021In: Class-11-Physics

Is it necessary that work done in the motion of a body over a closed loop is zero for every force in nature ? Why?

NCERT Solutions for Class 11 Science Work energy and power 4 Important Board Questions Work energy and power NCERT Books for Session 2020-2021 CBSE Board and UP Board 2 Marks Questions

Vanshya

Asked: February 13, 2021In: Class-11-Physics

A truck and a car moving with the same K.E. on a straight road. Their engines are simultaneously switched off which one will stop at a lesser distance?

NCERT Solutions for Class 11 Science Work energy and power 4 Important Board Questions Work energy and power NCERT Books for Session 2020-2021 CBSE Board and UP Board 2 Marks Questions

Vanshya

Asked: February 13, 2021In: Class-11-Physics

Mountain roads rarely go straight up the slope, but wind up gradually. Why?

NCERT Solutions for Class 11 Science Work energy and power 4 Important Board Questions Work energy and power NCERT Books for Session 2020-2021 CBSE Board and UP Board 2 Marks Questions

Vanshya

Asked: February 13, 2021In: Class-11-Physics

How much work is done by a coolie walking on a horizontal platform with a load on his head ? Explain.

NCERT Solutions for Class 11 Science Work energy and power 4 Important Board Questions Work energy and power NCERT Books for Session 2020-2021 CBSE Board and UP Board 2 Marks Questions

Vakti Singh

Asked: February 12, 2021In: Class-11-Physics

Define spring constant of a spring.

NCERT Solutions for Class 11 Science Work energy and power 4 Important Board Questions Work energy and power NCERT Books for Session 2020-2021 CBSE Board and UP Board 1 Marks Questions

Vakti Singh

Asked: February 12, 2021In: Class-11-Physics

A body is moving at constant speed over a frictionless surface. What is the work done by the weight of the body?

NCERT Solutions for Class 11 Science Work energy and power 4 Important Board Questions Work energy and power NCERT Books for Session 2020-2021 CBSE Board and UP Board 1 Marks Questions

Vakti Singh

Asked: February 12, 2021In: Class-11-Physics

What happens to the P.E. of a bubble when it rises in water?

NCERT Solutions for Class 11 Science Work energy and power 4 Important Board Questions Work energy and power NCERT Books for Session 2020-2021 CBSE Board and UP Board 1 Marks Questions

Vakti Singh

Asked: February 12, 2021In: Class-11-Physics

Name a process in which momentum changes but K.E. does not.

NCERT Solutions for Class 11 Science Work energy and power 4 Important Board Questions Work energy and power NCERT Books for Session 2020-2021 CBSE Board and UP Board 1 Marks Questions

Give an example in which a force does work on a body but fails to change its K.E.

How high must a body be lifted to gain an amount of P.E. equal to the K.E. it has when moving at speed 20 ms⁻¹. (The value of acceleration due to gravity at a place is 9.8 ms⁻²).

Is it necessary that work done in the motion of a body over a closed loop is zero for every force in nature ? Why?

A truck and a car moving with the same K.E. on a straight road. Their engines are simultaneously switched off which one will stop at a lesser distance?

Mountain roads rarely go straight up the slope, but wind up gradually. Why?

How much work is done by a coolie walking on a horizontal platform with a load on his head ? Explain.

Define spring constant of a spring.

A body is moving at constant speed over a frictionless surface. What is the work done by the weight of the body?

What happens to the P.E. of a bubble when it rises in water?

Name a process in which momentum changes but K.E. does not.

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