200J
400J
800J
1600J
Correct answer is B
K.E = \(\frac{1}{2}Mv^2 = \frac{1}{2} \times 2 \times 20^2 = 400J\)
28.0Ns
20.0Ns
4.0Ns
0.8Ns
Correct answer is C
Ft = I = MY - Mv
I = 16 - 12 = 4Ns
which of the following statements about simple harmonic motion is correct? The
total mechanical energy is always conserved
linear acceleration is directed to any variable point
linear acceleration varies inversely with displacement
period of oscillation varies linearly as acceleration due to gravity
Correct answer is A
No explanation has been provided for this answer.
Which of the following quantities is a vector?
speed
distance
energy
momentum
Correct answer is D
No explanation has been provided for this answer.
A car accelerates uniformly from rest at 5 ms-2. Determine its speed after 10s
50.0ms-1
25.0ms-1
2.0ms-1
0.5ms-1
Correct answer is A
V = u + at = 0 + 5 x 10 = 50m/s2