Math Method Unit 4 Relay

• -log_{10}(x)

• 2

• 4

• 14

• 16

• 1.25

• 1.26

• 1.31

• 1.88

• 7

• 8

• 9

• 10

The displacement (in metres) of a particle is given by s(t) = -3cos(t) + 2sin(t), where t is in seconds. The instantaneous velocity of the particle at time t = π/2 seconds is:

• -3 ms^-1

• -2ms^-1

• 2 ms^-1

• 3 ms^-1

• (1.609, 15)

• (1.099, 1)

• (0.4065, 2)

• (-0.693, 6)

An object travels in a straight line so that its velocity at time t seconds is given by v(t) = 2t + sin(2t). Determine the expression for acceleration as a function of time.

• a(t) = 2 + 2cos(2t)

• a(t) = 2 - 1/2cos(2t)