Question

The motion of a block sliding down a frictionless ramp can be described as motion with

• A. A constant speed, independent of the slope of the ramp
• B. A constant speed that depends on the slope of the ramp
• C. An acceleration which increases as the block slides
• D. A constant acceleration less than $10m/s^2$
• E. A constant acceleration greater than $10m/s^2$

Answer 1

The correct option is D A constant acceleration less than $10m/s^2$

Given,

Acceleration of gravity, $g=10m/s^2$

Motion of block is on ramp,

So, ramp have an angle, $\theta$ $(0<\theta <{90}^o)$

Component of gravity, that gives motion = $g\sin \theta$

If $0<\theta <{90}^o$, then $0<\sin \theta <1$

$0<g\sin \theta <g$

Hence, Acceleration is constant and less than $10m/s^2$