Physics Answers

A car and driver, with a total mass of 1350kg, moving at 30m/s on a horizontal road when the driver sees roadworks ahead. She brakes, decelerating with a constant force of 600N until arriving at the roadworks. Find the time elapsed before arriving at the roadworks.

f you have a circuit consisting of 4

4

 resistors of equal resistance in series and the total voltage across all of them is 17

17

 V

V

, what is the voltage across each of them?

When 10 cells of emf 10V are connected in parallel total emf is

a cars velocity decreases uniformly 20 m/s to 6m/s while covering 70m distance in a straight line. Find its acceleration and time taken to the travel distance

A body is projected downward at an angle of 30° with the horizontal from the

top of a building 170 m high.

Its initial speed is 40 m/s. (a) How long will it

take before striking the ground? (b) How far from the foot of the building will it

strike? (c) At what angle with the horizontal will it strike?

A vehicle of mass 1,5Mg on brake test , traveling at 90km/h has the brakes applied to produce maximum braking.The coefficient of friction between the tyres and road is 0,8.Calculate the breaking force applied to the vehicle?

03*. A truck travelling at 22.5 m/s decelerates at 2.27 m/s2.

(a) How much time does it take for the truck to stop? [9.91s]

(b) How far does it travel while stopping? [112 m]

(c) How far does it travel during the third second after the brakes are applied? [16.8 m]

Charges tend to move "downhill" in potential. "Yes" or "No".

a particle moves in a straight line from O with initial velocity 5m/s . its acceleration ts later is (4-2t) m/s. calculate its final velocity

Four forces act on an object such that the object is at rest. Three of the forces are given by F₁ = 21-2j, F₂=i-4j, F4 = −3i-5j. Determine F3 and its magnitude.