List of top Physics Questions on Speed and velocity asked in WBJEE JENPAS UG

Let \(\overrightarrow r_P(t)=3t\hat i+4t²\hat j\) and \(\overrightarrow r_Q(t)=4t^2\hat i+3t\hat j\) represent the positions of particles P and respectively as function of time t. The relative speed of the two particles at the instant t = 1 sec will be [consider \(\overrightarrow r_P(t)\) and \(\overrightarrow r_Q(t)\) are in metres and t is in seconds]

Five molecules of an ideal gas have velocities 2, 3, 4, 4 and 5 m/s. If their average velocity is \(\bar v\) and their RMS velocity is \(V_{rms}\) then

A thin uniform rod of length L and mass M is swinging freely about a horizontal axis passing through its end. Its maximum angular speed is ω. Its centre of mass rises to a maximum height of

The velocity \(v\) of a particle as a function of time t is given by \(v(t) = v_0 (1 – e^{–αt})\). The dimension of \(v_0/α\) is

An artificial satellite is moving in a circular orbit around the earth with a speed equal to half the magnitude of the escape velocity from the earth's surface. The height of the satellite above the earth's surface is [R = Radius of the earth]

A projectile is thrown with an initial velocity xî+yj from the ground. The range of the projectile is twice the maximum height of the projectile. The value of is \(\frac{ y}{x}\) is

A body initially at rest is moving with uniform acceleration 'a'. Its velocity after 'n' seconds is 'v'. The displacement of the body in last 2 seconds is