A racing car has a uniform acceleration of 4 m/s^2 . What distance will it cover in 10 s after start?

Here we have,  Initial velocity, u = 0 m/s  Acceleration (a) = 2 cm/s2 = 0.02 m/s2  Time (t) = 3 s  Final velocity, v = ?  We know that, v = u + at  Therefore,...

(i) A body is said in uniform acceleration when its motion is along a straight line and its velocity changes by equal magnitude in equal interval of time.  (ii) A body...

Distance covered by car = 57336.0 km - 57321.0 km = 15.0 km Time taken between 08:30 AM to 08:50 AM = 20 minutes = 20/60 hour = 1/3 hour...

(ii) 25 km------------------- Solution: Case I: Speed = 40 km/h Time = 15 min = 15/60 hour Distance = Speed × Time = 40×15/60=10 km Case II: Speed = 60 km/h Time = 15 min = 15/60 hour Distance...

The child may put his/her fingers into the socket and he/she may get an electric shock which could be fatal.

θ = 100 π; t = 5 sec θ = 1/2 αt2 = 100 π = 1/2 α 25 α = 8π × 5 = 40 π rad/s = 20 rev/s α = 8π rad/s2 = 4 rev/s2 ω = 40π rad/s2...

θ = 5 rev, α = 2 rev/s2, ω0 = 0 ; ω = ? ω2 = (2 α θ) ω = √(2 x 2x 5) = 2 √5 rev/s. or θ = 10π rad,  α= 4π rad/s2, ω0 =...

(c)  2/v = 1/v1 + 1/v2. Explanation: Time taken during first phase =  x/v1 and during second phase =  x/v2.  Total distance =2x   Total time taken = (x/v1)+(x/v2) = x(1/v1 +1/v2)     Average velocity =Total distance/Total...

(e) Speed of the car = Distance Covered / TimeTaken = 816/12 =68 kmph.

(b) Distance = 64 × 8 = 512 km Speed =512/6 = 85 km/hr (approx.)