Can you accelerate a car on a frictionless horizontal road by putting more petrol in the engine? Can you stop a car going on a frictionless horizontal road by applying brakes?

Two bodies of masses 2 kg and 3 kg are connected by a metal wire of cross-section 0.04 mm^(2) and are placed on a frictionless horizontal surface. Breaking stress of metal wire is 2.5 Gpa. The maximum force F that can be applied to 3kg block so that wire does not break is

A 4.0 kg block is put on top of a 5.0kg block. In order to cause the top block to slip on the bottom one, a horizontal force of 12N must be applied to the top block. Assuming a friction less table the maximum horizontal force F which can be applied to the lower block so that the blocks, will move together should be

A rope placed straight on a frictionless floor is pulled longtudinally by a force F. Tension force 7^(@) developed in the rope at a point varies with distance x of the point from the rear end as shown in the graph. What can you certainly conclude about density of the rope?

A toy car with charge q moves on a frictionless horizontal plane surface under the influence of a uniform electric field vecE. Due to the force q vecE, its velocity increases from 0 to 6 m/s in one second duration. At that instant the direction of the field is reversed. The car continues to move for two more second under the influence of this filed. The average velocity and the average speed of the toy car between 0 to 3 seconds are respectively,

Two moasses m_(1)=5kg and m_(2)=10kg, connected by an inextensible string over a frictionless pulley, are moving as shown in the figure. The coefficient of friction of horizontal surface is 0.15. The minimum weitght m that should be put on top of m_(2) to stop the motion is :-

Car A of mass 1000 kg moves on a horizontal straight road with speed 36kmh^(-1) . If the force resisting the motion is 100 N, then find the power of the engine. Now, after covering 200 m distance, car A collides with a stationary car B of same mass and becomes stationary. As a result car B start moving on the horizontal road, then what would be the speed of car B just after the collision? (The engine of car B is off.)

Two blocks of m asses 6 kg and 2 kg are placed in contact on a horizontal frictionless surface. If a horizontal force of 2N is applied to m ass 6 kg to move them together, what will be the acceleration of 2 kg block ? What will be the force on this block ?

A car is moving along a banked road laid out as a circle of radius r . (a) What should be the banking angle theta so that the car travelling at speed v needs no frictional force from tyres to negotiate the turn ? (b) The coefficient of friction between tyres and road are mu_(s) = 0.9 and mu_(k) = 0.8 . At what maximum speed can a car enter the curve without sliding toward the top edge of the banked turn ?