Recent questions tagged ch5

You are thrown from a bicycle and skid in a straight line to a complete stop on a rough road at t a distance of 3.5 m along a straight line. What average force did the road exert on your body if your mass is 70 kg and your initial speed was 30 km/h?

asked Aug 19, 2014 by balaji.thirumalai

1 answer

A crate with mass 32.5 kg initially at rest on a warehouse floor is acted on by a net horizontal force of 140 N. How far does the crate travel in 10.05 s?

asked Aug 19, 2014 by balaji.thirumalai

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If a net horizontal force of 130 N is applied to a person with mass 60 kg who is resting on the edge of a swimming pool, what is the horizontal acceleration produced?

asked Aug 19, 2014 by balaji.thirumalai

1 answer

Consider a block of mass 5 kg on a table top initially at rest. Assume that the surface is frictionless. Let a pushing force of 50 N directed at an angle of 30$^\circ$ below the horizontal act on the block. Find the acceleration of the block and the normal force that the table exerts on the block.

asked Aug 19, 2014 by balaji.thirumalai

1 answer

Consider a box of mass 10 kg being lifted upward by a person standing on the surface of the earth. At a given instant the box is being accelerated upwards with an acceleration of size 5 m/s$^2$. Find the force that the person exerts on the box at this instant.

asked Aug 19, 2014 by balaji.thirumalai

1 answer

Imagine you are standing on a cardboard box that is only just strong enough to support your weight. What would happen to it if you tried to jump into the air? The cardboard box would

asked Aug 19, 2014 by balaji.thirumalai

1 answer

An object experiences an acceleration of magnitude $3.75 m/s^2$. Calculat the mass of the object given there are three forces acting on an object as follows:

asked Aug 19, 2014 by balaji.thirumalai

1 answer

A force applied to an object of mass $\text{m1}$ produces an acceleration of 3.00 ms$^{-2}$. The same force applied to a second object of mass $\text{m2}$ produces an acceleration of 1.00 ms$^{-2}$. If the two masses are combined into one object, what is the acceleration under the action of the force?

asked Aug 19, 2014 by balaji.thirumalai

1 answer

A force applied to an object of mass $\text{m1}$ produces an acceleration of 3.00 ms$^{-2}$. The same force applied to a second object of mass $\text{m2}$ produces an acceleration of 1.00 ms$^{-2}$. What is the value of the ratio $\large\frac{\text{m1}}{\text{m2}}$?

asked Aug 19, 2014 by balaji.thirumalai

1 answer

What are the missing forces on this Free Body Diagram?

asked Aug 19, 2014 by balaji.thirumalai

1 answer

What is the missing force on this Free Body Diagram?

asked Aug 19, 2014 by balaji.thirumalai

1 answer

If the forces acting upon an object are balanced, then the object

asked Aug 19, 2014 by balaji.thirumalai

1 answer

A 2-kg object is moving horizontally with a speed of 8 m/s. How much net force is required to keep the object moving at this speed and in this direction?

asked Aug 19, 2014 by balaji.thirumalai

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Let an object be at rest initially and you push it with constant force across a friction-less surface for a time internal $\Delta t$ resulting in a final speed of $v$ for the object. Now, if you repeat the experiment with a force that is twice as large, what will be the time internal needed to reach the same final speed $v$?

asked Aug 19, 2014 by balaji.thirumalai

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Consider a car moving west along a highway with a constant velocity of 65 km per hour. What happens when the driver takes his foot off the accelerator pedal?

asked Aug 19, 2014 by balaji.thirumalai

1 answer

Suppose we are standing in a stationary bus and the driver starts the bus suddenly. Which of the following is correct?

asked Aug 19, 2014 by balaji.thirumalai

1 answer

An astronaut accidentally gets separated out of his small spaceship accelerating in inter stellar space at a constant rate of 100 m s$^{-2}$. What is the acceleration of the astronaut the instant after he is outside the spaceship assuming there are no nearby stars to exert gravitational force on him?

asked Aug 19, 2014 by balaji.thirumalai

1 answer

Consider a cart on a horizontal friction-less surface. Once the cart has been given a push and released, it moves with constant velocity. What would have to be done in order to have the cart continue with constant acceleration?

asked Aug 19, 2014 by balaji.thirumalai

1 answer

Consider a cart on a horizontal friction-less surface. Once the cart has been given a push and released, what will happen to the cart?

asked Aug 19, 2014 by balaji.thirumalai

1 answer

Which of the following statements is MOST correct?

asked Aug 19, 2014 by balaji.thirumalai

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You kick a smooth flat stone out on a frozen pond. The stone slides, slows down, and eventually stops. This is because:

asked Aug 19, 2014 by balaji.thirumalai

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You put your book on the bus seat next to you. When the bus suddenly stops, the book slides forward off the seat. Why?

asked Aug 19, 2014 by balaji.thirumalai

1 answer

A hockey puck slides on ice at constant velocity. What is the net force acting on the puck?

asked Aug 19, 2014 by balaji.thirumalai

1 answer

A book is lying at rest on a table. The book will remain there at rest because

asked Aug 19, 2014 by balaji.thirumalai

1 answer

How many among the following plants belong to family fabaceae:sesbania,colchicine,asparagus,cucumber,belladonna,sunhemp,petunia,indigofera,tobacco,soyabean

asked May 6, 2014 by sreemathi.v

1 answer

Basal placentation occurs in

asked May 6, 2014 by sreemathi.v

1 answer

The surface fibers of commercial use are obtained from

asked May 6, 2014 by sreemathi.v

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Aestivation of petals in the flower of cotton is correctly shown in

asked May 6, 2014 by sreemathi.v

2 answers

Fruit of ground nut is

asked May 6, 2014 by sreemathi.v

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Caryopsis is fruit of

asked May 6, 2014 by sreemathi.v

1 answer

Most advanced type of inflorescence:-

asked May 6, 2014 by sreemathi.v

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A dicot plant showing parallel venation

asked May 6, 2014 by sreemathi.v

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Which is a modification of root that does not store food

asked May 6, 2014 by sreemathi.v

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Aloe is a member of which family

asked May 5, 2014 by sreemathi.v

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Replum is found in the ovary of

asked May 5, 2014 by sreemathi.v

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Fruit of solanaceae family is :-\begin{array}{1 1}(i)\;\text{Legume}&(ii)\;\text{Berry}\\(iii)\;\text{Capsule}&(iv)\;\text{Nut}\end{array}

asked May 5, 2014 by sreemathi.v

1 answer

Cruciform corolla is found in

asked May 5, 2014 by sreemathi.v

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Lateral branches of stem are :-

asked May 5, 2014 by sreemathi.v

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Swollen leaf base is k/a

asked May 5, 2014 by sreemathi.v

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Zig-zag arrangement of flowers on a common axis represents :-

asked May 5, 2014 by sreemathi.v

1 answer

Catkin is a type of

asked May 5, 2014 by sreemathi.v

1 answer

A monocots could be distinguished from dicots by

asked May 5, 2014 by sreemathi.v

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Rhizome of ginger is a modification of stem because :-

asked May 5, 2014 by sreemathi.v

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Edible part of turnip is :-

asked May 5, 2014 by sreemathi.v

2 answers

Roots associated with nitrogen fixing bacteria are :-

asked May 5, 2014 by sreemathi.v

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Many plants of which family are a rich source of protein?

asked May 5, 2014 by sreemathi.v

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The 'eyes' of potato tuber are :-

asked May 5, 2014 by sreemathi.v

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Tetradynamous condition occurs in :-

asked May 5, 2014 by sreemathi.v

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Inflorescence is the collection of :-

asked May 5, 2014 by sreemathi.v

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Arrangement of sepals & petals with respect to one another is

asked May 5, 2014 by sreemathi.v

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