Physics Answers

A package rests on the back seat of your car. The coefficient of friction between the seat and the package is 0.24. Assuming you drive on a level road, what is the maximum acceleration your car can have if the package is to remain in place relative to your back seat?

A projectile is fired from a cannon at a speed of 301 m/s and at an angle of 3 degrees. How long does it take the projectile to reach the highest point? How far does it go horizontally?

1. A basketball player can jump 0.72m off the floor from a standing position. Calculate the player’s speed when leaving the floor

If a wire of length 4 meter is carrying a current of 2 Ampere,calculate the magnetic field strength at a distance of 3 meter from the wire

A thermal tap used in certain apparatus consists of a silica rod which fits tightly
inside an Aluminium tube whose internal diameter is 8 mm at 0℃ . When the
temperature is raised, the fit is no longer exact. Calculate what change in temperature
is necessary to produce a channel whose cross-section is equal to that of a tube of
1 mm internal diameter

A ball is launched at 4.5 m/s at 66° above the horizontal. It starts and lands at the same distance from the ground. What are the maximum height above its launch level and the flight time of the ball?

Given that vector A =5i-7j+3k and B=-4i+4j-8k,find (I)AxB(ii)BxA

A jug is at 15oC and is filled with water at an initial temperature of 85oC. The mass of water is 2.5kg. SHC is 4200. If the final temperature of the water is 34oC:

1. what is the final temperature of the jug?
2. if the jug has a SHC of 400J/kg/oC, what is its mass?

A calorimeter contains 110cm3 of water. The water absorbs heat and its temperature changes from 17∘C to 27∘C